Dual-motor tailsitters

Hello Evreybody !

After update to with V4.2.0dev (2251293e) version, made a manual tune, find and set Q_TAILSIT_DSKLD value, yesterday I made :
the first sucesfull sequence QSTABILIZE > FBWA > QHOVER > LANDING
THANKS TO ALL COTRIBUTORS, GREAT JOB :slight_smile: