AudioTheory Guitars 3.1.2

Just a small patch today. AudioTheory Guitars 3.1.2 includes the following changes:

• Chords are now correctly loaded from .txt preset files that also include a scale preset
  
• The fretboard position is now slightly offset on 16:10 to account for the extra screen height. This was already in effect on the iPad version of AudioTheory Guitars, but now it's here in the desktop version too.
  
• Press colour has been added to the cross button in the options popout
  
• The Quit and User Guide dropdown options now fully close the dropdown before running their respective functions