filemanager: Only retry every 2sec if path opening doesn't work right away to avoid busy loop

src/js/filemanager.js

@@ -168,7 +168,7 @@ app.controller('FileManagerController', ['$scope', '$translate', '$timeout', 'Cl
         }
 
         Client.filesGet($scope.id, $scope.type, parentPath, 'data', function (error, result) {
-            if (error) return openPath(path); // try again
+            if (error) return setTimeout(function () { openPath(path); }, 2000); // try again in some time
 
             // amend icons
             result.entries.forEach(function (e) {