UI improvements and bug fixes (2025-03-04)
- Add shortening function to username, if username is too long (max. 6 characters).
- Change 'doc' to 'doc_start' in help button.
- Remove help button from dropdown list and add it to navbar.
- Remove headerButtonGroup and add links directly to header.html.ep.
- Remove tooltip from help button.
- Fix sidebar appearance when user navigates to /settings.
- Fix content shift for pages (due to /settings modification).
- Change fixed value for hint positioning to dynamic value.

Change-Id: I7ee84bff170c4985494895cdacd1ed77d60320db
diff --git a/dev/scss/media.scss b/dev/scss/media.scss
index ce23ee5..8201f8b 100644
--- a/dev/scss/media.scss
+++ b/dev/scss/media.scss
@@ -48,12 +48,16 @@
 
     .burger-icon {
       position: relative;
-      display: block !important;
+      display: none;
       width: $standard-size-and-spacing;
       height: $standard-size-and-spacing;
       font-size: 1.8rem;
       color: $nearly-white;
 
+      &.show {
+        display: block;
+      }
+
       &::after {
         position: absolute;
         top: 2rem;
@@ -145,9 +149,14 @@
 
         &.profile {
           & + .dropdown-content {
-            margin-top: 4rem;
+            margin-top: 3.9rem;
           }
         }
+
+        h3.user-name {
+          max-width: unset;
+          overflow: unset;
+        }
       }
 
       &-content {