Support for MouseWheel()

[Erik]

Currently, there are a lot of selection screens, and items that require you to click to increment, or decrement a integer, since byond 508 MouseWheel was added, to allow for scrolling up, and down.

Here are a few things that could benefit from MouseWheel

• Telescience coord input
  
• Brig timers
  
• Timer assemblies
  
• Scrolling on the screen to switch hands, or scrolling on a hand to switch hands