AGW on Phoenix: use `SetDeviceClippingRegion` in `tabart.py` when the argument is a `wx.Region`

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@73670 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
AGW on Phoenix: remove `wx.GenericDatePickerCtrl` from `persist_handlers.py`

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxPython/Phoenix/trunk@73671 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775