Control Sanity Check: Requirements for tablet same as pathplanner

Since TableControl can enable full navigation, require all modules
to be running to allow tablet control.
Control: When in tablet mode still use events from transmitter

This means disarming and arming behaves like normal in tablet
control mode.
Control: Tablet mode uses HoldPosition instead

Previously the combination of FlightMode = PositionHold and
PathDesired.Mode = FlyEndpoint did not work.  Using HoldPosition
instead.