Fixed a (shift) tab focus change regression on Windows for spinbuttons/comboboxes. There were 2 versions of this code, one in _wndproc and one in _colorwndproc. The _colorwndproc version handled spinbuttons and comboboxes correctly, but due to an earlier key press fix, both versions were getting called... the incorrect one first causing focus to be given to the wrong control. Removed the extra complete version from _wndproc allowing _colorwnd proc to work.