comctl32/tab: Draw hottracked tab button properly (resent)

[Vitaliy Margolen]

Nikolay Sivov wrote:
> With patch this time.
> 
> This makes hottracked tab button look like it does in native.
> Bounding rectangle is still wrong but it's another problem,
> anyway now it looks better.
Maybe you should fix that rectangle first? There were few differences I
recall in size of the update regions between Wine and native. The drawing
errors could be the result of those differences.

Vitaliy.