Qt: Fix monospace font in osx 10.9

The "Monospace" hint was added in Qt 4.8, and it works as intended as opposed
to "TypeWriter" which fails to load a font.
this fixes compilation error on win32
Merge remote-tracking branch 'remotes/origin/macfontfix' into master-rc4
Merge remote-tracking branch 'remotes/origin/win32compilefix' into master-rc4