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/unix/apptbase.h

@@ -48,7 +48,7 @@ public:
     virtual wxFDIOManager *GetFDIOManager();
 #endif // wxUSE_SOCKETS
 
-#if wxUSE_CONSOLE_EVENTLOOP
+#if wxUSE_EVENTLOOP_SOURCE
     // Return a non-NULL pointer to the object responsible for managing the
     // event loop sources in this kind of application.
     virtual wxEventLoopSourcesManagerBase* GetEventLoopSourcesManager();