Windowkill 3.2.0b hotfix

Note to linux users reporting stuttering, please try enabling the "limit fps" option, this seems to solve the issue for most users.

New Features

• Added the menu music as a selectable music track in-game
• Added a couple missing credits

Fixes

• Fixed aim angle getting stuck sometimes for some users
• Fixed windows 3.1 theme enabled before unlocking
• Fixed visual bug with blip unlock secret
• Fixed text overflowing with relaunch tooltip in some languages