Add option for Decimal / Hex

[bazz1tv]

Depends on #50 (checkbox). Tied to #52.

Once again, not everyone is a coder. Not everyone understands hex. Allow for decimal / hex toggle option. Should affect the UI display of:

• sample panel indices
• instrument panel indices
• sample editor valuez
• instrument editor values
• song settings values
• SPD / ADD values
• pattern editor indices
• pattern sequencer indices
• pattern sequencer pattern numbers.

(not worded.correctly yet, but) Need to decide how to best tie the classes that represent this data, with the UI settings without trashing having data structures indepedent of the UI. Some data structures are already UI exclusive, which is good, such as SamplePanel and InstrumentPanel. Maintain that sort of GUI collection of.classes on top of the core data.