Flight display: Fix visuals, hide states that should not be operated, make sliders safer and allow to reduce altitude when in air

Firmware plugin: Sequence guided mode correctly, widen modes in which guided support should be available

Scale increment and decimal fields according to cooked unit, so that the decimal and increments provided by meta data still work in the cooked display

Android done.

UI Tweaks for all mobile platforms.

* PX4: Deal properly with optional components

* RC map UI: Offer better defaults and user guidance