Use wxBITMAP_TYPE_{BMP,CUR,ICON}_RESOURCE by default under Windows, even for
non-wxMSW ports.
Also allow loading wxImage from resources in all ports under MSW as a side
effect of this change.
Closes #14425.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@71889 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775