Changes
- added instrument keymap selector and display for what's in the keymap
- added additional keymaps
- GW2 - The Minstrel (with auto octave keys)
- GW2 - The Minstrel (without auto octave keys)
- GW2 - Choir Bell
- GW2 - Flute (key of C)
- GW2 - Flute (native key of E)
- added file menu items for better accessing the app's config
- moved multipleOctaveShiftDelay constant into the app config
- fix checkbox styling