gwl: fix focusing on the wrong app after moving an app between workspaces

Signed-off-by: Milan Kotykov <milankotykov@outlook.com>

Author: m-cote

files/usr/share/cinnamon/applets/grouped-window-list@cinnamon.org/appGroup.js

@@ -975,7 +975,11 @@ var AppGroup = class AppGroup {
 
             this.calcWindowNumber();
             this.updateNotificationsBadge();
-            this.onFocusChange();
+            const hasFocus = getFocusState(metaWindow);
+            if (hasFocus) {
+                this.workspaceState.set({lastFocusedApp: this.groupState.appId});
+            }
+            this.onFocusChange(hasFocus);
         }
         set({
             metaWindows,