fixed panel menu while in fullscreen mode

public/app/features/panel/panelMenu.js

@@ -155,6 +155,9 @@ function (angular, $, _) {
               if (panelLeftPos + menuLeftPos < 0) {
                 menuLeftPos = 0;
               }
+              if ($scope.fullscreen) {
+                menuHeight = -(menuHeight/2);
+              }
 
               $menu.css({'left': menuLeftPos, top: -menuHeight});
             });