Move the heading role on the sidebar label (bug 2020737)

Author: calixteman

web/viewer.html

@@ -126,7 +126,7 @@
                   aria-describedby="viewsManagerHeaderLabel"
                   data-l10n-id="pdfjs-views-manager-sidebar"
                 >
-                  <div id="viewsManagerHeader" role="heading" aria-level="2">
+                  <div id="viewsManagerHeader">
                     <div id="viewsManagerTitle">
                       <div id="viewsManagerSelector">
                         <button
@@ -164,7 +164,7 @@
                           </li>
                         </menu>
                       </div>
-                      <span id="viewsManagerHeaderLabel" class="viewsManagerLabel"></span>
+                      <span id="viewsManagerHeaderLabel" class="viewsManagerLabel" role="heading" aria-level="2"></span>
                       <button
                         id="viewsManagerAddFileButton"
                         class="toolbarButton viewsManagerButton"