fix clicking on checkboxes in menus or on ghosted menu items slides in a blank page

interface/resources/qml/hifi/tablet/TabletMouseHandler.qml

@@ -149,6 +149,8 @@ Item {
                     // Don't block waiting for modal dialogs and such that the menu might open.
                     delay.trigger(item);
                     clearMenus();
+                    // build root level menu
+                    tabletMenu.buildMenu();
                     break;
                 }
         }