There was a version check in the menu handling, but Windows 8.1 and
Windows 10 weren't recognised and some pre Windows 98 code was used.
This is a combination of the following wxWidgets upstream commits.
9280f836c2569d0f50301a1117f7ba144e5240d2
1966dfb17d7cb106d1dfb44df6a15b92ba3b8d5f
c87c432033f4277bc9995a4de1390a59b810a005
a8c98a119145a77b1313337314853de75562e4ab
Thanks to micove for finding the commits.
Configures the settings in include/wx/msw/setup.h.
Removes icons from include/wx/msw/wx.rc.
Deletes include/wx/msw/rcdefs.h (autogenerated by build process).
Updates .gitignore by including wxWidgets3.0 build files and adds a
missing '/' to build.
Jonathan Li