8026476: Choice does not get mouse events if it does not have enough place for popup menu

Reviewed-by: anthony, serb
Contributed-by: alexander.zvegintsev@oracle.com

src/solaris/classes/sun/awt/X11/XChoicePeer.java

@@ -814,12 +814,12 @@ public class XChoicePeer extends XComponentPeer implements ChoicePeer, ToplevelS
                 x = screen.width - width;
             }
 
+            if (y + height > screen.height) {
+                y = global.y - height;
+            }
             if (y < 0) {
                 y = 0;
             }
-            else if (y + height > screen.height) {
-                y = screen.height - height;
-            }
             return new Rectangle(x, y, width, height);
         }