[Bug 7200] Tab control flickers too much

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=7200

------- Additional Comments From [e-mail]  2007-19-01 12:28 -------
Maybe your box is too fast. :-)

Believe me, it's there (switch between the tabs over and over again and you'll
eventually see it).

It's also obvious from the code that we aren't even trying to avoid flickering, 
everytime a tab is focused/added/deleted we call TAB_InvalidateTabArea() which
does just that, invalidates the hole tab area.