Use all horizontal space for title

Change-Id: Ib3d93a89ab9993e296ce0512be3b7aa36885234d
diff --git a/inst/rmarkdown/templates/posterdown_ids/resources/template.html b/inst/rmarkdown/templates/posterdown_ids/resources/template.html
index 78bec88..5dbf249 100644
--- a/inst/rmarkdown/templates/posterdown_ids/resources/template.html
+++ b/inst/rmarkdown/templates/posterdown_ids/resources/template.html
@@ -106,8 +106,8 @@
 position: relative;
 float: left;
 margin-left: 2.5%;
-margin-right: 2.5%;
-width: 75%;
+margin-right: 0;
+width: 80%;
 height: 100%;
 color: $if(title_textcol)$$title_textcol$$else$#000000$endif$;
 top: 50%;