Fix inconsistency between SF title in the tree and in the content

www/common/drive-ui.js

@@ -3945,7 +3945,8 @@ define([
                     var newRoot = Util.find(manager, ['folders', sfId, 'proxy', manager.user.userObject.ROOT]) || {};
                     subfolder = manager.hasSubfolder(newRoot);
                     // Fix name
-                    key = manager.getSharedFolderData(sfId).title || Messages.fm_deletedFolder;
+                    var sfData = manager.getSharedFolderData(sfId);
+                    key = sfData.title || sfData.lastTitle || Messages.fm_deletedFolder;
                     // Fix icon
                     $icon = isCurrentFolder ? $sharedFolderOpenedIcon : $sharedFolderIcon;
                     isSharedFolder = sfId;

www/common/proxy-manager.js

@@ -973,8 +973,8 @@ define([
         if (!resolved.id) {
             var el = Env.user.userObject.find(resolved.path);
             if (Env.user.userObject.isSharedFolder(el) && Env.folders[el]) {
-                Env.folders[el].proxy.metadata.title = data.newName;
-                Env.user.proxy[UserObject.SHARED_FOLDERS][el].lastTitle = data.newName;
+                Env.folders[el].proxy.metadata.title = data.newName || Messages.fm_folder;
+                Env.user.proxy[UserObject.SHARED_FOLDERS][el].lastTitle = data.newName || Messages.fm_folder;
                 return void cb();
             }
         }