Correctly show Override button when out of sync

gui/index.html

@@ -299,7 +299,7 @@
                 </table>
               </div>
               <div class="panel-footer">
-                <button class="btn btn-sm btn-danger pull-left" ng-if="folderStatus(folder) == 'idle' && folder.readOnly && model[folder.id].needFiles > 0" ng-click="override(folder.id)" href=""><span class="glyphicon glyphicon-upload"></span>&nbsp;<span translate>Override Changes</span></button>
+                <button class="btn btn-sm btn-danger pull-left" ng-if="folderStatus(folder) == 'outofsync' && folder.readOnly" ng-click="override(folder.id)" href=""><span class="glyphicon glyphicon-upload"></span>&nbsp;<span translate>Override Changes</span></button>
                 <span class="pull-right">
                   <button class="btn btn-sm btn-default" href="" ng-show="['idle', 'stopped'].indexOf(folderStatus(folder)) > -1" ng-click="rescanFolder(folder.id)"><span class="glyphicon glyphicon-refresh"></span>&nbsp;<span translate>Rescan</span></button>
                   <button class="btn btn-sm btn-default" href="" ng-click="editFolder(folder)"><span class="glyphicon glyphicon-pencil"></span>&nbsp;<span translate>Edit</span></button>