Made light palette reverse of dark palette

Disable calibration buttons while calibrating

Also changed to pull specific small parameters set after cal instead of
full refresh. This way, the red/green indicators update much more
quickly.

Preflight check

Also converted to new logging category

So this special casing is no longer needed

Output audio for NOTICE severity STATUSTEXT messages.

qtlogging.ini automatically created at startup, populated with full list of category names

Show user friendly port name in Serial Settings combo box.

If it doesn’t exist it will be prefilled with all registered categories
set to false

Added missing libsdl install for README for Ubuntu

Serial port fix

Changed settings version as the link configurations must be redone (with the new port names)

Disabling (undone) prop and mag cal settings.

Cleanup remnants OpalRT and Kinect

Added code to handle point size fonts in all QML widgets.

Audio improvements

Otherwise some messages say 'System MAV 0-20' and some say 'System 20'.

Initial Battery Config

Add assert back