Bugfix. Bookmarks list didn't remember toggle state

We need to wait for the state to be fetched from storage before
rendering the list.

dist/converse.js

@@ -48940,9 +48940,16 @@ _converse_headless_converse_core__WEBPACK_IMPORTED_MODULE_0__["default"].plugins
           'id': id
         });
         this.list_model.browserStorage = new Backbone.BrowserStorage[storage](id);
-        this.list_model.fetch();
-        this.render();
-        this.sortAndPositionAllItems();
+
+        const render = () => {
+          this.render();
+          this.sortAndPositionAllItems();
+        };
+
+        this.list_model.fetch({
+          'success': render,
+          'error': render
+        });
       },
 
       render() {

src/converse-bookmarks.js

@@ -440,9 +440,12 @@ converse.plugins.add('converse-bookmarks', {
                       id = `converse.room-bookmarks${_converse.bare_jid}-list-model`;
                 this.list_model = new _converse.BookmarksList({'id': id});
                 this.list_model.browserStorage = new Backbone.BrowserStorage[storage](id);
-                this.list_model.fetch();
-                this.render();
-                this.sortAndPositionAllItems();
+
+                const render = () => {
+                    this.render();
+                    this.sortAndPositionAllItems();
+                }
+                this.list_model.fetch({'success': render, 'error': render});
             },
 
             render () {