Drag-and-Drop for USFM markers

[johnml1135]

User Story
(Serval developer here): Serval drafting often messes up the intra-verse USFM markers. Users will need to be able to fix these manually (no matter what smarts we put in to do a best-guess). One idea from a user is to click and drag the markers to the right location. I don't know how this could best be done (separate editor screen, separate plugin, standard behavior), but it seems like a capital idea.

Description
An editor mode (or default) in which I can click on intra-verse USFM markers (however they are visualized and entered) and be able to move them around. This would include figures, footnotes, cross-references, etc.

Implementation idea
No idea. Would this by Lynx? The shared editor? Something completely separate?