Merge wxQT branch into the trunk.

This merges in the latest sources from GSoC 2014 wxQt project with just a few
minor corrections, mostly undoing wrong changes to common files in that branch
(results of a previous bad merge?) and getting rid of whitespace-only changes.
Also remove debug logging from wxGrid.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77455 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/qt/app.h

@@ -0,0 +1,32 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        app.h
+// Purpose:     wxApp class
+// Author:      Peter Most
+// Modified by:
+// Created:     08/08/09
+// Copyright:   (c) Peter Most
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_QT_APP_H_
+#define _WX_QT_APP_H_
+
+#include <QtWidgets/QApplication>
+
+class WXDLLIMPEXP_CORE wxApp : public wxAppBase
+{
+public:
+    wxApp();
+    ~wxApp();
+    
+    virtual bool Initialize(int& argc, wxChar **argv);
+
+private:
+    QApplication *m_qtApplication;
+    int m_qtArgc;
+    char **m_qtArgv;
+    
+    wxDECLARE_DYNAMIC_CLASS_NO_COPY( wxApp );
+};
+    
+#endif // _WX_QT_APP_H_