Make wxMSW status bar slightly less tall by default.

Make wxMSW status bar slightly less tall by default.

The status bar in wxMSW applications was too big under Windows 7 because it
used EDIT_HEIGHT_FROM_CHAR_HEIGHT() to calculate the height which was simply
unwarranted here. Instead, make the status bar tall enough to accommodate
simple text contents by default and fix SetMinHeight() to actually work for
the cases when a taller toolbar is needed.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69867 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775