LUT-25199: Improved management of concurrent access when editing a page

Author: TimotheeHrl

webapp/WEB-INF/templates/skin/plugins/wiki/somebody_is_editing.html

@@ -7,7 +7,7 @@
             <h6 style="align-content: center">${user_name?replace("_", " ")} #i18n{wiki.somebody_is_editing}</h6>
             <button class="btn btn-default">
                 <a href="jsp/site/Portal.jsp?page=wiki&view=page&page_name=${page_name}" title="#i18n{wiki.button.backToPage}">
-                    <span class="glyphicon glyphicon-chevron-left"></span> #i18n{wiki.button.backToPage}
+                    <span class="fa fa-chevron-left"></span> #i18n{wiki.button.backToPage}
                 </a>
             </button>
         </div>