[feat] Right click drag to move

[justise]

Figma recently added the ability to right click and drag

I really love it, and it would be nice to be able to do without having to switch tools.

[dwelle]

We've had a proof-of-concept implementation once but decided to postpone shipping as it wasn't decided whether we won't use right-click for a different selection. Well, it's still not decided, but more people ask for this than they ask for the other, so we'll likely go ahead.

Out of curiosity, does middle-mouse-button dragging not work or isn't possible in your case?

(duplicate of #4448)

[justise]

Middle button works, much appreciated!