Remove all BeginDrawing/EndDrawing calls

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@74229 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Change time of nightly builds to try and avoid the semi-regular svn failures

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@74230 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775