kwin/convergentwindows: keep current window maximized bugfix

This fix maximizes the current window if it ever leaves a fullscreen or maximized state. This is to fix a bug where if a window exits fullscreen mode, it will not return back to a maximized state.

kwin/scripts/convergentwindows/contents/ui/main.qml

@@ -9,6 +9,8 @@ import org.kde.plasma.private.mobileshell.shellsettingsplugin as ShellSettings
 Loader {
     id: root
 
+    property var currentWindow
+
     function run(window) {
         // HACK: don't maximize xwaylandvideobridge
         // see: https://invent.kde.org/plasma/plasma-mobile/-/issues/324
@@ -44,6 +46,27 @@ Loader {
         }
     }
 
+    Connections {
+        target: currentWindow
+
+        function onFullScreenChanged() {
+            currentWindow.interactiveMoveResizeFinished.connect((currentWindow) => {
+                root.run(currentWindow);
+            });
+            root.run(currentWindow);
+        }
+
+        function onMaximizedChanged() {
+            if (!currentWindow.maximizable) {
+                return;
+            }
+            currentWindow.interactiveMoveResizeFinished.connect((currentWindow) => {
+                root.run(currentWindow);
+            });
+            root.run(currentWindow);
+        }
+    }
+
     Connections {
         target: ShellSettings.Settings
 
@@ -70,6 +93,16 @@ Loader {
             }
         }
 
+        function onWindowActivated(window) {
+            if (window.normalWindow) {
+                currentWindow = window;
+                window.interactiveMoveResizeFinished.connect((window) => {
+                    root.run(window);
+                });
+                root.run(window);
+            }
+        }
+
         function onScreensChanged() {
             // Windows are moved from the external screen
             // to the internal screen if the external screen