[Orgmode] Org suggestion: option which allows moving subtrees freely

[PT]

Often I want to move an item or a subtree to an other location
with M-up/down and I get the message "Cannot move past superior
level".

I think there could be an option allowing this behavior. In
practice I found sometimes it would be quicker and easier to move
stuff under a different heading in the same file by simply using
Meta+cursor keys than using the refill interface.