QmlProfiler: use QQuickWidget instead of window container

Using QQuickWidget removes the need for some work-arounds.

Task-number: QTCREATORBUG-11822
Change-Id: I1e344f0a9c11b4aa8601e8e1056602d855fb3f4d
Reviewed-by: Ulf Hermann <ulf.hermann@theqtcompany.com>

src/plugins/qmlprofiler/qmlprofilertraceview.h

@@ -32,7 +32,6 @@
 #define QMLPROFILERTRACEVIEW_H
 
 #include "qmlprofilermodelmanager.h"
-#include <QQuickView>
 #include <QWidget>
 #include <QTimer>
 
@@ -85,14 +84,6 @@ private:
     QmlProfilerTraceViewPrivate *d;
 };
 
-class QmlProfilerQuickView : public QQuickView {
-public:
-    QmlProfilerQuickView(QmlProfilerTraceView *parent) : parent(parent) {}
-protected:
-    QmlProfilerTraceView *parent;
-    bool event(QEvent *ev);
-};
-
 } // namespace Internal
 } // namespace QmlProfiler