Feature Request: Click and Drag

I'd love to see an option to click and drag objects with Vimium. For instance, here's a site I frequently use where I have to click and drag with the mouse to reorder the items in the list:

It would help in part if LinkHints.activateMode had a "click and hold" option. Unfortunately, even if the list items are clickable, there's no built-in keyboard functionality to move the items up and down, so Vimium would also have to have some way to emulate a mouse movement.

Begin with the LinkHints.activateMode entry point mentioned in the issue; no file or test is identified, so trace how it handles activation and how mouse movement is represented. Done means Vimium can initiate a click-and-hold action and emulate the movement needed to reorder items on sites that require dragging.