gui: Fix File Versioning icon to match in all places (#9070)

Currently, different icons are used for File Versioning when displayed
in the unfolded folder info in the main part of the GUI, and the icon
used in the Edit Folder modal. This changes the main GUI icon to match
the icon used in the modal.

Signed-off-by: Tomasz Wilczyński <[email protected]>

gui/default/index.html

@@ -533,7 +533,7 @@
                         </td>
                       </tr>
                       <tr ng-if="folder.versioning.type">
-                        <th><span class="fa fa-fw fa-file"></span>&nbsp;<span translate>File Versioning</span></th>
+                        <th><span class="fa fa-fw fa-files-o"></span>&nbsp;<span translate>File Versioning</span></th>
                         <td class="text-right">
                           <span ng-switch="folder.versioning.type">
                             <span ng-switch-when="trashcan" translate>Trash Can</span>

gui/default/syncthing/folder/editFolderModalView.html

@@ -4,7 +4,7 @@
       <ul class="nav nav-tabs" ng-init="loadFormIntoScope(folderEditor)">
         <li ng-class="{'disabled': currentFolder._editing == 'new-ignores'}" class="active"><a data-toggle="tab" href="{{currentFolder._editing == 'new-ignores' ? '' : '#folder-general'}}"><span class="fas fa-cog"></span> <span translate>General</span></a></li>
         <li ng-class="{'disabled': currentFolder._editing == 'new-ignores'}"><a data-toggle="tab" href="{{currentFolder._editing == 'new-ignores' ? '' : '#folder-sharing'}}"><span class="fas fa-share-alt"></span> <span translate>Sharing</span></a></li>
-        <li ng-class="{'disabled': currentFolder._editing == 'new-ignores'}"><a data-toggle="tab" href="{{currentFolder._editing == 'new-ignores' ? '' : '#folder-versioning'}}"><span class="fas fa-copy"></span> <span translate>File Versioning</span></a></li>
+        <li ng-class="{'disabled': currentFolder._editing == 'new-ignores'}"><a data-toggle="tab" href="{{currentFolder._editing == 'new-ignores' ? '' : '#folder-versioning'}}"><span class="fa fa-files-o"></span> <span translate>File Versioning</span></a></li>
         <li ng-class="{'disabled': currentFolder._recvEnc}"><a data-toggle="tab" href="{{currentFolder._recvEnc ? '' : '#folder-ignores'}}"><span class="fas fa-filter"></span> <span translate>Ignore Patterns</span></a></li>
         <li ng-class="{'disabled': currentFolder._editing == 'new-ignores'}"><a data-toggle="tab" href="{{currentFolder._editing == 'new-ignores' ? '' : '#folder-advanced'}}"><span class="fas fa-cogs"></span> <span translate>Advanced</span></a></li>
       </ul>