Expose root plan keys

Hack fix for terrain crash when new query comes through before old query is complete

Fix Change Command parameter default setting

Don't add takeoff as first item when it doesn't make sense for vehicle

Respect app units

Kick off terrain query after load

Don't query intermediate state

Fix failure handling

Save camera settings

Fixed issue where the "Set Circle Radius" menu entry was trying to affect the visibility of an item within a component.

Fixed issue where the "Set Circle Radius" menu entry was trying to affect the visibility of an item within a component.