INtroduced OnInternalIdle as per wxGTK so that users
cannot as easily lill the internals.
Fixed pop-up transient window.
Removed some #if 0 here and there.
Made refresh code work in idle instead of directly.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14176 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775