changes to tempo (the BPM of a tempo text) don't propagate between score and parts

changes to tempo (the BPM of a tempo text) don't propagate between score and parts, if "Follow Text' is disabled or can't work as no appropriate text is available, e.g. just "Adagio", like it would be for moste score impoerted from 1.x, but can also be done manually in 2.0

1e68b443f5