Fix high CPU load in grid customizer (GH9060)

Ensure the animation layer paint is called at least once inside
paintComponent so that the animation timer is shut down.

Author: neilcsmith-net

java/form/src/org/netbeans/modules/form/layoutsupport/griddesigner/GlassPane.java

@@ -1501,8 +1501,6 @@ public void actionPerformed(ActionEvent e) {
             if(!noChange(change)) {
                 animChange = change;
                 animLayer.animate();
-            } else {
-                animation = false;
             }
         }