Removed setCoordinate support to reduce confusion

Moves all params into param array instead of using GeoCoordinate for
param 5/6/7

- Load/Save working
- Entry point working

Plus new unit tests

Also additional major Mission usability changes

- override by vehicle type
- override by firmware type

Standalone coordinate don’t connect to waypoint lines

Standalone coordinate don’t connect to waypoint lines

Both altitude and acceptance radius will track last value

- New mission command editor dialog
- New MissionCommands toolbox object to get command info
- Added APM mission item set

Also friendly editor for MAV_CMD_NAV_ROI and MAV_CMD_DO_SET_SERVO