Finish settings overlay

[Timendus]

Mainly because the auto-detection isn't perfect.

Settings to select:

• Interpreter type
  • Auto-detect
  • VIP
  • SCHIP
  • XO-CHIP
  • Silicon8?
• Execution speed
• XO-CHIP colours per Allow changing first four colours for XO-CHIP compatibility #7?
• Individual quirks (not yet exposed)

[Timendus]

Added an overlay allowing the selection of interpreter type and execution speed. Colours is a todo. I'm not sure if exposing the quircks is going to be very useful to anyone.