Admin-UI to move&rotate (ref-)images

[sirtet]

Comparison of current- to ref- images works a lot better if the images align perfectly.

But alignment is easily lost, if a Camera mount moves for some reason.
So it would be cool to have an admin-UI that allows to easily move and rotate the ref-images.

(Or should the timeline images be moved? And should they be altered or move/rotate data be stored alongside? Maybe in the Metadata?
Modifying the timeline images will result in always aligned images, modifying the ref-images will make them align only to one state of the timeline images.)
Anyways, probably the bigger Work would be to implement the UI, regardless of how it's used.
Maybe there's already a library that comes close to what we would need.
https://interactjs.io/ seems to be a possible candidate.