modal dialogs don't have busy cursor even if wxIsBusy()
2. wxTextCtrl sets client data field in the generated events
3. added wxEnhMetaFile::SetClipboard()
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@6296 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775