Various UX issues

[subdavis]

A collection of issues discussed with @russeldj and @BryonLewis

Nothing ready for immediate work, but it's good to get this info.

• [x] No user or folder search. It might be nice to enable the search component.
• [ ] Document shortcuts to editing mode, and lots of other missing docs in the annotator.
• [x] Search by user
• [ ] Tag jobs with creator ID to figure out who started stuff without going through the token collection
• [ ] Image loading can be slow for large images.
• [ ] Support for more robust data formats like kwCOCO

Also talked about:

• Ability to compare datasets by loading them using 2 different classes overlaid
• Ability to compare by loading side-by-side. (Probably not going to happen soon)

[waxlamp]

@subdavis, we'll definitely need to give this issue a haircut and then probably spin off one issue per item.