fix bug #690: workaround - list all storages

It is currently unclear howto restrict storages for container usage.
The 'rootdir' property does not work anymore, because we can now create
containers on normal VM image files.

www/manager/window/Restore.js

@@ -23,7 +23,7 @@ Ext.define('PVE.window.Restore', {
 	    name: 'storage',
 	    value: '',
 	    fieldLabel: gettext('Storage'),
-	    storageContent: (me.vmtype === 'lxc') ? 'rootdir' : 'images',
+	    storageContent: 'images,rootdir',
 	    allowBlank: true
 	});