Improvements - v0.5.0.65

Just a few improvements, mainly to the recent jukebox addition, oh and you can now pin top HUD's if you wish to keep the more detailed info on screen.

Patch notes:-

• Jukebox now has a mute button.
  
• Having jukebox enabled now gives a morale boost for human workers.
  
• Jukebox has an alternative off image.
  
• Top HUD's can now be pinned.
  

Nick