HideTracker: Use custom window rect for overlap calculation

Author: leolost2605

src/ShellClients/HideTracker.vala

@@ -171,7 +171,7 @@ public class Gala.HideTracker : Object {
                 continue;
             }
 
-            if (!panel.window.get_frame_rect ().overlap (window.get_frame_rect ())) {
+            if (!panel.get_custom_window_rect ().overlap (window.get_frame_rect ())) {
                 continue;
             }