Fixed misc menu issues

Fixed gamemode names spanning across multiple lines. Left is before, right is after; pay close attention to the Space Build gamemode name.
![gamemode names](http://i.imm.io/12Pem.png)

Fixed gamemodes list not being visible on small resolutions. The style changes using css media queries. Check the css for additional details.
![small resolutions](http://i.imm.io/12Pkp.png)
Issue was originally posted here: http://facepunch.com/showthread.php?t=1259253