Saving and exiting FX Learn causes XTouch colors to switch to track colors instead of plugin colors

[higginsdragon]

This is a cosmetic bug, doesn't affect functionality.

When using Learn in FX to link controls, the LCD colors will switch to the track colors instead of remaining on the FX LCD colors.

This also might be the same on the X32.

To reproduce:

1. Set up several tracks with any colors and make sure they're displayed on the X-Touch
2. Create/enter an FX on one of the tracks
3. Press Inst to Learn
4. Adjust and save link, then exit

Result: The unused LCD colors switch to the track colors.

Expected result: The LCD colors stay on the FX colors.

I can poke at this, but likely won't get to it until the weekend.