phoenix and py3 port patch from CMcP

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@73758 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
remove completed build todo items

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@73759 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
OnEnabled is gone

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@73760 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775