individual commit for the indentation because otherwise
the diff gets unreadable. this indentation is made because
afterwards the entire legacy position control functionality
is in an else case.

and make it use matrix library for flight task compatibility

# Conflicts:
#	src/modules/mc_pos_control/mc_pos_control_main.cpp

# Conflicts:
#	src/modules/mc_pos_control/mc_pos_control_main.cpp

all the ones with mc_pos_control need the library, we should use cmake dependencies!

because upstream there needs to be a
common mavlink command definition first
and then it can be easily reenabled again

This reverts commit cf2d794d.

on vehicle rotation in yaw

FlightTasks: create enumeration type for the task index while still offering integer index with checks