block user sorting in recent files

apps/files/js/filelist.js

@@ -174,6 +174,11 @@
 		 */
 		_clientSideSort: true,
 
+		/**
+		 * Whether or not users can change the sort attribute or direction
+		 */
+		_allowSorting: true,
+
 		/**
 		 * Current directory
 		 * @type String
@@ -718,7 +723,7 @@
 				$target = $target.closest('a');
 			}
 			sort = $target.attr('data-sort');
-			if (sort) {
+			if (sort && this._allowSorting) {
 				if (this._sort === sort) {
 					this.setSort(sort, (this._sortDirection === 'desc')?'asc':'desc', true, true);
 				}

apps/files/js/recentfilelist.js

@@ -28,6 +28,7 @@ $(document).ready(function () {
 				direction: 'desc'
 			};
 			this.initialize($el, options);
+			this._allowSorting = false;
 		};
 		RecentFileList.prototype = _.extend({}, OCA.Files.FileList.prototype,
 			/** @lends OCA.Files.RecentFileList.prototype */ {