Making the file dialog resizable(implementing OFN_ENABLESIZING)

[Diaa Sami]

Hi,
The attached patch fixes the bug at http://bugs.winehq.org/show_bug.cgi?id=10394 , can you have a look at it.

It's pretty much done except for some nasty bug and the repainting problem.

-- 
Regards,
Diaa Sami

[Diaa Sami]

Sorry for the multiple posts, happened by mistake.