ArduPilot: ChibiOS flash support for Pixhawk family boards

Fix trad heli mappings

Formatting changes

Fix NuttX build url format

iOS build and mobile sizing

Fix xcode project and restore LaunchImage
Cleanup unused icons

ArduPilot ChibiOS support

Upstream stable merge

Plan: Change Command only supported for Simple Items

Prompt for Reboot after compass cal

Change Command only supported for Simple Items

Prompt for Reboot after compass cal

Polygon Circle: Respect app units

Respect app units

Terrain: Use NaN for bad elevation value

Use NaN to signal lower level error

More terrain query fixes/logging

Don't query intermediate state

Better logging

Add new Help page under Settings

Terrain Tiles: Persist header info as doubles

Add new Help page under Settings

Persist tile info as doubles. This prevent float/double precision match errors at the edge of tiles.

Bump terrain tile version due to format change

Terrain: Better error handing

Turn internal errors (elevation == -1) into failed query to prevent bogus elevation from reaching upper layers.

Fix failure handling

Use qCWarning for internal errors