Several UI tweaks

[mkruselj]

1. Link buttons are placed between O1/O2 and W1/W2 so that Keytrack/Bend Range/Limit controls can align with two rows above them
2. Part Select and User Pattern buttons have their LEDs above them rather than below, to balance better visually with the text labels
3. Detune Pan is DePan now (as on hardware)
4. Amplifier & Pan header shortened to just Amplifier
5. Moved controls in User Pattern section down 15 px so that vertical offset from the header line and the Pattern Length knob is identical to knobs below the Arpeggiator header
6. ALL LEDs are made unclickable now
7. Wave Envelope Loop Start/End menus are now matching hardware values, which are 1-based (rather than 0-based which was the case until now)
8. The three FX parameters now default to 64 instead of 0, which is more useful to hear the effect as soon as you load it.

Pics: