Remove unnecessary wxUSE_MFC option.

This didn't do (almost) anything, so just remove it, using MFC and wxWidgets
together works just fine without it.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78277 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Move wxRendererMSW::DrawTextCtrl() implementation to wxRendererGeneric.

This ensures that wxRendererGeneric::DrawGauge() is actually usable as
otherwise calling it always resulted in an assertion failure because it used
DrawTextCtrl() which was not implemented in wxRendererGeneric. So this fixes
using DrawGauge() in non-MSW ports which was added by r77023 (see #16406) but
apparently never worked.

Also remove wxRendererMSW::DrawGauge() as it's exactly the same as the version
inherited from wxRendererGeneric.

Closes #16725.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78278 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Fix inserting tools removed from wxToolBar back into it in wxMSW.

Make sure to reset the "to be deleted" flag we set on the tool when removing
it from the toolbar to avoid layout problems if the tool is added back later.

Closes #16735.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78279 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775