Use 16:9 aspect and bump reveal.js to 5.1.0

Change-Id: I6384639329daef18a40ca55cbd3c4eab0ae500e1
diff --git a/inst/reveal.js-5.1.0/dist/theme/ids.css b/inst/reveal.js-5.1.0/dist/theme/ids.css
new file mode 100644
index 0000000..301ed22
--- /dev/null
+++ b/inst/reveal.js-5.1.0/dist/theme/ids.css
@@ -0,0 +1,693 @@
+/**
+ * IDS theme for reveal.js
+ *
+ * By Marc Kupietz
+ */
+@import url("https://code.cdn.mozilla.net/fonts/fira.css");
+@import url("https://korap.ids-mannheim.de/font/fira-condensed.css");
+@import url("https://korap.ids-mannheim.de/font/libertinus.css");
+section.has-dark-background, section.has-dark-background h1, section.has-dark-background h2, section.has-dark-background h3, section.has-dark-background h4, section.has-dark-background h5, section.has-dark-background h6 {
+  color: #fff;
+}
+
+/*********************************************
+ * GLOBAL STYLES
+ *********************************************/
+:root {
+  --r-background-color: #fff;
+  --r-main-font: Libertinus Serif, Helvetica, sans-serif;
+  --r-main-font-size: 42px;
+  --r-main-color: #222;
+  --r-block-margin: 20px;
+  --r-heading-margin: 0 0 20px 0;
+  --r-heading-font: Fira Sans Condensed, Fira Sans, Helvetica, sans-serif;
+  --r-heading-color: #f6a800;
+  --r-heading-line-height: 1.2;
+  --r-heading-letter-spacing: 0.05ex;
+  --r-heading-text-transform: uppercase;
+  --r-heading-text-shadow: none;
+  --r-heading-font-weight: 600;
+  --r-heading1-text-shadow: none;
+  --r-heading1-size: 2em;
+  --r-heading2-size: 1.35em;
+  --r-heading3-size: 0.9em;
+  --r-heading4-size: 0.7em;
+  --r-code-font: monospace;
+  --r-link-color: #2a76dd;
+  --r-link-color-dark: #1a53a1;
+  --r-link-color-hover: #6ca0e8;
+  --r-selection-background-color: #98bdef;
+  --r-selection-color: #fff;
+  --r-overlay-element-bg-color: 240, 240, 240;
+  --r-overlay-element-fg-color: 0, 0, 0;
+}
+
+.reveal-viewport {
+  background: #fff;
+  background-color: var(--r-background-color);
+}
+
+.reveal {
+  font-family: var(--r-main-font);
+  font-size: var(--r-main-font-size);
+  font-weight: normal;
+  color: var(--r-main-color);
+}
+
+.reveal ::selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal ::-moz-selection {
+  color: var(--r-selection-color);
+  background: var(--r-selection-background-color);
+  text-shadow: none;
+}
+
+.reveal .slides section,
+.reveal .slides section > section {
+  line-height: 1.3;
+  font-weight: inherit;
+}
+
+/*********************************************
+ * HEADERS
+ *********************************************/
+.reveal h1,
+.reveal h2,
+.reveal h3,
+.reveal h4,
+.reveal h5,
+.reveal h6 {
+  margin: var(--r-heading-margin);
+  color: var(--r-heading-color);
+  font-family: var(--r-heading-font);
+  font-weight: var(--r-heading-font-weight);
+  line-height: var(--r-heading-line-height);
+  letter-spacing: var(--r-heading-letter-spacing);
+  text-transform: var(--r-heading-text-transform);
+  text-shadow: var(--r-heading-text-shadow);
+  word-wrap: break-word;
+}
+
+.reveal h1 {
+  font-size: var(--r-heading1-size);
+}
+
+.reveal h2 {
+  font-size: var(--r-heading2-size);
+}
+
+.reveal h3 {
+  font-size: var(--r-heading3-size);
+}
+
+.reveal h4 {
+  font-size: var(--r-heading4-size);
+}
+
+.reveal h1 {
+  text-shadow: var(--r-heading1-text-shadow);
+}
+
+/*********************************************
+ * OTHER
+ *********************************************/
+.reveal p {
+  margin: var(--r-block-margin) 0;
+  line-height: 1.3;
+}
+
+/* Remove trailing margins after titles */
+.reveal h1:last-child,
+.reveal h2:last-child,
+.reveal h3:last-child,
+.reveal h4:last-child,
+.reveal h5:last-child,
+.reveal h6:last-child {
+  margin-bottom: 0;
+}
+
+/* Ensure certain elements are never larger than the slide itself */
+.reveal img,
+.reveal video,
+.reveal iframe {
+  max-width: 95%;
+  max-height: 95%;
+}
+
+.reveal strong,
+.reveal b {
+  font-weight: bold;
+}
+
+.reveal em {
+  font-style: italic;
+}
+
+.reveal ol,
+.reveal dl,
+.reveal ul {
+  display: inline-block;
+  text-align: left;
+  margin: 0 0 0 1em;
+}
+
+.reveal ol {
+  list-style-type: decimal;
+}
+
+.reveal ul {
+  list-style-type: disc;
+}
+
+.reveal ul ul {
+  list-style-type: square;
+}
+
+.reveal ul ul ul {
+  list-style-type: circle;
+}
+
+.reveal ul ul,
+.reveal ul ol,
+.reveal ol ol,
+.reveal ol ul {
+  display: block;
+  margin-left: 40px;
+}
+
+.reveal dt {
+  font-weight: bold;
+}
+
+.reveal dd {
+  margin-left: 40px;
+}
+
+.reveal blockquote {
+  display: block;
+  position: relative;
+  width: 70%;
+  margin: var(--r-block-margin) auto;
+  padding: 5px;
+  font-style: italic;
+  background: rgba(255, 255, 255, 0.05);
+  box-shadow: 0px 0px 2px rgba(0, 0, 0, 0.2);
+}
+
+.reveal blockquote p:first-child,
+.reveal blockquote p:last-child {
+  display: inline-block;
+}
+
+.reveal q {
+  font-style: italic;
+}
+
+.reveal pre {
+  display: block;
+  position: relative;
+  width: 90%;
+  margin: var(--r-block-margin) auto;
+  text-align: left;
+  font-size: 0.55em;
+  font-family: var(--r-code-font);
+  line-height: 1.2em;
+  word-wrap: break-word;
+  box-shadow: 0px 5px 15px rgba(0, 0, 0, 0.15);
+}
+
+.reveal code {
+  font-family: var(--r-code-font);
+  text-transform: none;
+  tab-size: 2;
+}
+
+.reveal pre code {
+  display: block;
+  padding: 5px;
+  overflow: auto;
+  max-height: 400px;
+  word-wrap: normal;
+}
+
+.reveal .code-wrapper {
+  white-space: normal;
+}
+
+.reveal .code-wrapper code {
+  white-space: pre;
+}
+
+.reveal table {
+  margin: auto;
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+
+.reveal table th {
+  font-weight: bold;
+}
+
+.reveal table th,
+.reveal table td {
+  text-align: left;
+  padding: 0.2em 0.5em 0.2em 0.5em;
+  border-bottom: 1px solid;
+}
+
+.reveal table th[align=center],
+.reveal table td[align=center] {
+  text-align: center;
+}
+
+.reveal table th[align=right],
+.reveal table td[align=right] {
+  text-align: right;
+}
+
+.reveal table tbody tr:last-child th,
+.reveal table tbody tr:last-child td {
+  border-bottom: none;
+}
+
+.reveal sup {
+  vertical-align: super;
+  font-size: smaller;
+}
+
+.reveal sub {
+  vertical-align: sub;
+  font-size: smaller;
+}
+
+.reveal small {
+  display: inline-block;
+  font-size: 0.6em;
+  line-height: 1.2em;
+  vertical-align: top;
+}
+
+.reveal small * {
+  vertical-align: top;
+}
+
+.reveal img {
+  margin: var(--r-block-margin) 0;
+}
+
+/*********************************************
+ * LINKS
+ *********************************************/
+.reveal a {
+  color: var(--r-link-color);
+  text-decoration: none;
+  transition: color 0.15s ease;
+}
+
+.reveal a:hover {
+  color: var(--r-link-color-hover);
+  text-shadow: none;
+  border: none;
+}
+
+.reveal .roll span:after {
+  color: #fff;
+  background: var(--r-link-color-dark);
+}
+
+/*********************************************
+ * Frame helper
+ *********************************************/
+.reveal .r-frame {
+  border: 4px solid var(--r-main-color);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
+}
+
+.reveal a .r-frame {
+  transition: all 0.15s linear;
+}
+
+.reveal a:hover .r-frame {
+  border-color: var(--r-link-color);
+  box-shadow: 0 0 20px rgba(0, 0, 0, 0.55);
+}
+
+/*********************************************
+ * NAVIGATION CONTROLS
+ *********************************************/
+.reveal .controls {
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PROGRESS BAR
+ *********************************************/
+.reveal .progress {
+  background: rgba(0, 0, 0, 0.2);
+  color: var(--r-link-color);
+}
+
+/*********************************************
+ * PRINT BACKGROUND
+ *********************************************/
+@media print {
+  .backgrounds {
+    background-color: var(--r-background-color);
+  }
+}
+body {
+  background-image: url("https://corpora.ids-mannheim.de/slides/reveal.js.ids/images/IDS-Logo-2019.svg"), url("https://corpora.ids-mannheim.de/slides/reveal.js.ids/images/orange_bar.png") !important;
+  background-repeat: no-repeat !important;
+  background-position: top 20px right 20px, top 20px left !important;
+  background-size: 25vH auto, 4vH 16vH !important;
+}
+
+:root {
+  --r-bold-color: #f6a800;
+  --r-list-bullet-color: #f6a800;
+}
+
+.reveal strong, .reveal b {
+  color: var(--r-bold-color);
+}
+.reveal ul li::marker, .reveal ol li::marker {
+  color: var(--r-list-bullet-color) !important;
+}
+
+/*********************************************
+ * FOOTER
+ *********************************************/
+#ids-footer:not(title-slide) {
+  opacity: 1;
+  background: white;
+  color: #444444;
+  border-top: dotted orange 2px;
+  transition: opacity 800ms ease-in-out;
+  position: fixed;
+  height: 6%;
+  line-height: 6%;
+  z-index: -20;
+  width: 100%;
+  letter-spacing: 0em;
+  text-align: center;
+  display: table;
+}
+
+#ids-footer span {
+  height: 100%;
+  line-height: 100%;
+  z-index: -20;
+  font-size: 2vh;
+  font-family: "Fira Sans Condensed", "Fira Sans", "Roboto Condensed", "League Gothic", Impact, sans-serif;
+  display: inline-block;
+  display: table-cell;
+  vertical-align: middle;
+}
+
+/* Bottom position for the IDS-Footer footer when both progress bar and TOC-Progress are visible */
+div.progress[style="display: block;"] ~ #ids-footer {
+  bottom: calc(3px + 0vh);
+}
+
+/* Bottom position for the IDS-Footer footer when TOC-Progress is visible */
+#ids-footer {
+  bottom: 3px;
+}
+
+#ids-footer a {
+  color: #555555;
+}
+
+/* Bottom position for the IDS-Footer footer when progress bar is visible */
+div.progress[style="display: block;"] ~ footer:last-of-type#ids-footer {
+  bottom: 3px;
+}
+
+/* Bottom position for the IDS-Footer footer when neither progress bar nor TOC-Progress are visible */
+footer:last-of-type#ids-footer {
+  bottom: 0px;
+}
+
+/* Make IDS-Footer invisible if explicitly indicated */
+.no-ids-footer #ids-footer {
+  opacity: 0;
+  transition: opacity 800ms ease-in-out;
+}
+
+.title-frame #ids-footer {
+  opacity: 0;
+  transition: opacity 800ms ease-in-out;
+}
+
+.no-toc-progress #ids-footer {
+  opacity: 0;
+  transition: opacity 800ms ease-in-out;
+}
+
+/* Make IDS-Footer invisible in overview mode */
+.overview #ids-footer {
+  opacity: 0;
+  transition: opacity 800ms ease-in-out;
+}
+
+.reveal .title-frame .slide-number {
+  display: none !important;
+}
+
+.title-frame div.slide-background-content {
+  text-align: right !important;
+  background-image: url("https://corpora.ids-mannheim.de/slides/reveal.js.ids/images/Mitglied_WGL_transparent.svg") !important;
+  background-repeat: no-repeat;
+  background-position: right 90px bottom 10px !important;
+  background-size: 7vH auto !important;
+}
+
+.slide-menu-items, .slide-menu-toolbar {
+  font-family: "Fira Sans" !important;
+}
+
+/*
+ * Menu controls
+ */
+body .reveal .slide-menu-button {
+  color: #aaaaaa !important;
+  position: fixed;
+  left: 30px;
+  bottom: 2%;
+  vertical-align: middle;
+  z-index: 30;
+  font-size: 2vh;
+}
+
+#customcontrols > ul {
+  color: #aaaaaa !important;
+  position: fixed;
+  left: 50px;
+  bottom: 2% !important;
+  vertical-align: middle;
+  z-index: 30;
+  font-size: 2vh;
+}
+
+@media only screen and (min-width: 500px) {
+  #customcontrols > ul {
+    bottom: 2% !important;
+  }
+}
+.reveal .controls .controls-arrow {
+  position: relative;
+  width: 3.6em;
+  height: 3.6em;
+  bottom: -12px;
+  right: -4px;
+}
+
+.reveal h3, h4, h5, h6 {
+  text-transform: none !important;
+}
+
+.reveal h3, h4, h5, h6 {
+  text-transform: none !important;
+}
+
+.reveal h2 + h3 {
+  margin-top: -0.5em !important;
+}
+
+.reveal h1:last-child {
+  margin-top: 250px;
+}
+
+.title-frame h1,
+.title-frame h2 {
+  margin: 0 0 0 0;
+  background: rgb(246, 168, 0);
+  color: white;
+  font-family: "Fira Sans Condensed", "Roboto Condensed", Impact, sans-serif;
+  font-weight: 600;
+  line-height: 1.2;
+  letter-spacing: 0.05ex;
+  text-transform: uppercase;
+  width: 100%;
+  margin-top: 0.5em;
+  padding-top: 0.5em;
+  font-size: 1.75em;
+  margin-left: 0;
+  text-align: center;
+  text-shadow: none;
+  word-wrap: break-word;
+}
+
+.title-frame .author {
+  font-family: "Fira Sans Condensed", sans-serif;
+  font-weight: 400;
+  color: #657b83;
+  margin-top: 10vh;
+}
+
+.title-frame .place {
+  font-family: "Fira Sans Condensed", sans-serif;
+  margin-top: 40px;
+  font-weight: 400;
+  color: #657b83;
+}
+
+.title-frame h2 {
+  margin-top: -3px;
+  margin-bottom: 1em;
+  padding-bottom: 0.5em;
+  font-size: 1em;
+}
+
+/*********************************************
+ * TABLES
+ *********************************************/
+th {
+  color: rgb(246, 168, 0);
+}
+
+table {
+  font-family: "Fira Sans Condensed", sans-serif;
+  font-weight: 400;
+  font-size: 16px;
+}
+
+.reveal table.dataTable {
+  border: #aaaaaa 1px solid;
+  border-collapse: collapse;
+}
+
+.reveal table.dataTable td {
+  border: #aaaaaa 1px solid;
+  border-collapse: collapse;
+}
+
+.dataTables_wrapper .dataTables_length, .dataTables_wrapper .dataTables_filter, .dataTables_wrapper .dataTables_info, .dataTables_wrapper .dataTables_processing, .dataTables_wrapper .dataTables_paginate, table.dataTable thead > tr > th.sorting::before, table.dataTable thead > tr > th.sorting::after, table.dataTable thead > tr > th.sorting_asc::before, table.dataTable thead > tr > th.sorting_asc::after, table.dataTable thead > tr > th.sorting_desc::before, table.dataTable thead > tr > th.sorting_desc::after, table.dataTable thead > tr > th.sorting_asc_disabled::before, table.dataTable thead > tr > th.sorting_asc_disabled::after, table.dataTable thead > tr > th.sorting_desc_disabled::before, table.dataTable thead > tr > th.sorting_desc_disabled::after, table.dataTable thead > tr > td.sorting::before, table.dataTable thead > tr > td.sorting::after, table.dataTable thead > tr > td.sorting_asc::before, table.dataTable thead > tr > td.sorting_asc::after, table.dataTable thead > tr > td.sorting_desc::before, table.dataTable thead > tr > td.sorting_desc::after, table.dataTable thead > tr > td.sorting_asc_disabled::before, table.dataTable thead > tr > td.sorting_asc_disabled::after, table.dataTable thead > tr > td.sorting_desc_disabled::before, table.dataTable thead > tr > td.sorting_desc_disabled::after {
+  display: none;
+}
+
+.caption {
+  font-family: "Fira Sans Condensed", sans-serif;
+  font-weight: 400;
+  font-size: 16px;
+  text-align: center;
+}
+
+/*
+table.display td { white-space: nowrap; }
+*/
+.dt-buttons, .dataTables_filter {
+  margin-top: 10pt;
+}
+
+/* Sort Arrows in DataTables */
+table.dataTable thead > tr > th.sorting:before, table.dataTable thead > tr > th.sorting:after, table.dataTable thead > tr > th.sorting_asc:before, table.dataTable thead > tr > th.sorting_asc:after, table.dataTable thead > tr > th.sorting_desc:before, table.dataTable thead > tr > th.sorting_desc:after, table.dataTable thead > tr > th.sorting_asc_disabled:before, table.dataTable thead > tr > th.sorting_asc_disabled:after, table.dataTable thead > tr > th.sorting_desc_disabled:before, table.dataTable thead > tr > th.sorting_desc_disabled:after, table.dataTable thead > tr > td.sorting:before, table.dataTable thead > tr > td.sorting:after, table.dataTable thead > tr > td.sorting_asc:before, table.dataTable thead > tr > td.sorting_asc:after, table.dataTable thead > tr > td.sorting_desc:before, table.dataTable thead > tr > td.sorting_desc:after, table.dataTable thead > tr > td.sorting_asc_disabled:before, table.dataTable thead > tr > td.sorting_asc_disabled:after, table.dataTable thead > tr > td.sorting_desc_disabled:before, table.dataTable thead > tr > td.sorting_desc_disabled:after {
+  right: 0 !important;
+  line-height: 80% !important;
+}
+
+/*********************************************
+ * BIBLIOGRAPHY
+ *********************************************/
+.reveal .references {
+  font-family: "Fira Sans Condensed", sans-serif;
+  font-size: 16px;
+  text-align: left;
+  margin-top: 35px;
+  max-height: 540px;
+  font-weight: 400;
+  color: #253b43;
+  overflow-y: auto;
+}
+
+.hanging-indent > .csl-entry {
+  padding-left: 22px;
+  text-indent: -22px;
+}
+
+.csl-entry::first-line {
+  color: #253b43;
+}
+
+.csl-entry {
+  color: #888888;
+}
+
+/* Add line break after authors and year*/
+.csl-entry :first-child::before {
+  content: "\a";
+  white-space: pre;
+}
+
+.reveal code.sourceCode:last-child + pre {
+  height: 800px !important;
+}
+
+/*********************************************
+ * ARROWS and SLIDE NUMBERS
+ *********************************************/
+.reveal .controls .controls-arrow:after, .reveal .controls .controls-arrow:before {
+  width: 13px !important; /* size */
+  height: 4px; /* line width */
+}
+
+.reveal .controls {
+  display: none;
+  position: absolute;
+  top: auto;
+  bottom: -8px;
+  right: 16px;
+  left: auto;
+  z-index: 11;
+  /* color: #000;*/
+  pointer-events: none;
+  font-size: 8px;
+}
+
+.reveal .controls .controls-arrow {
+  position: relative;
+  height: 3.6em;
+  width: 1.2em; /* distance betwee arrows */
+  bottom: 0;
+  right: 0;
+}
+
+.reveal div.slide-number {
+  text-align: center;
+  width: 2em;
+  position: absolute;
+  display: block;
+  right: 29px;
+  bottom: 22px;
+  z-index: 31;
+  font-family: "Fira Sans Condensed", sans-serif;
+  font-size: 18px;
+  line-height: 1;
+  background-color: white;
+  color: #666;
+  padding: 0;
+}
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