Alt + Arrow keys to move Rem to new parent

Like in many text editors, I am able to use alt + arrow keys to moves lines of text up and down. But unfortunately I can only move those lines up and down within their current indent level. I would love it if I could continue moving a line up and down and the line would snap to whatever the next line’s indent level is.

This would help me quickly move items around in a Get Things Done workflow (I would like to move an item up from ‘Backlog’ into ‘Next Actions’: