Fix Follow X/Y calc from distance/angle

Add new ArduPilot VID/PID

Work around message disassembly issue on ARM 32-bit.
Fix memory leaks.

Allow plugin to add flight modes to joystick button actions

Move analyze page list model to the core plugin.

Tweak chart colors

UI tweaks

Limit chart to 6 series (arbitrary)
UI tweaks

WIP - MAVLink chart as a control. Add any number of charts with any number of series. All individually controlled.

Add custom chart header

Heading value should be real so NaN comes through