gui: Use info icon for folder ID (#5031)

gui/default/index.html

@@ -332,7 +332,7 @@
                 <table class="table table-condensed table-striped">
                   <tbody>
                     <tr ng-show="folder.label != undefined && folder.label.length > 0">
-                      <th><span class="fas fa-fw fa-folder-open"></span>&nbsp;<span translate>Folder ID</span></th>
+                      <th><span class="fas fa-fw fa-info-circle"></span>&nbsp;<span translate>Folder ID</span></th>
                       <td class="text-right no-overflow-ellipse">{{folder.id}}</td>
                     </tr>
                     <tr>