qtquick: Bunch of fixes for min-size support

src/private/quick/QWidgetAdapter_quick.cpp

@@ -60,8 +60,10 @@ QWidgetAdapter::QWidgetAdapter(QQuickItem *parent, Qt::WindowFlags flags)
     });
 
     connect(this, &QQuickItem::heightChanged, this, [this] {
-        onResize(size());
-        updateGeometry();
+        if (!m_windowIsBeingDestroyed) { // If Window is being destroyed we don't bother
+            onResize(size());
+            updateGeometry();
+        }
     });
 
     setSize(QSize(800, 800));
@@ -547,6 +549,11 @@ bool QWidgetAdapter::event(QEvent *ev)
     return QQuickItem::event(ev);
 }
 
+void QWidgetAdapter::setWindowIsBeingDestroyed(bool is)
+{
+    m_windowIsBeingDestroyed = is;
+}
+
 QQuickItem* KDDockWidgets::Private::widgetForWindow(QWindow *window)
 {
     if (!window)