fix: properly maximize windows via window decoration buttons

Apparently pressing the maximize button doesn't actually force the
window into any specific geometry. This resulted in windows staying in their
tiled geometry while all other windows would be rearranged as if the
maximized window would be floating.

This fix makes the maximized window fill the entire working area.

src/kwinscript/engine/window.ts

@@ -331,7 +331,11 @@ export class EngineWindowImpl implements EngineWindow {
     this.log.log(["Window#commit", { state: WindowState[state] }]);
     switch (state) {
       case WindowState.NativeMaximized:
-        this.window.commit(undefined, undefined, false);
+        this.window.commit(
+          this.window.surface.workingArea,
+          undefined,
+          undefined
+        );
         break;
 
       case WindowState.NativeFullscreen: