One pixel segment handling.
- added 0D FX metadata (1 pixel effects)
- ignore palettes for White only segment
- ignore color for non-RGB & non-White segment (on/off)
Bugfix
- proper auto segment creation
- hide palettes for non RGB segments
- some tweaks for #2984
- force Solid for some FX (causing crash) on 1 pixel segment
UI Optimisations
- slider tooltips
- tiny bit smaller tooltips
- hide segment power if only one segment
- gap between sliders