Don't query system option in every DrawBitmap() call under MSW.

Don't query system option in every DrawBitmap() call under MSW.

Doing this had noticeable (and bad) performance implications so cache the
value of the option during the first call. This doesn't allow changing its
value during the program execution so we may want to provide some way to
update its value later if really needed.

Closes #11172.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61967 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775