Implement label review UX

[nathanielrindlaub]

• [x] Ability to toggle between images and labels for unit of iteration
• [x] Ability to delete, add, edit labels & bounding boxes
• [x] Rapid label validation / invalidation with keys?

[nathanielrindlaub]

Implement https://github.com/tnc-ca-geo/animl-api/issues/17 first.

[nathanielrindlaub]

• [x] add UI buttons for incrementing/decrementing labels
• [x] improve UX/UI for turning on reviewMode and setting iteration options (enable AWSD keys for navigation, skip empty images, skip locked objects)
• [x] fix bugs w/ rapid review mode. Simplify & speed up code
• [x] fix loupe styling bugs & make responsive
• [x] Integrate with backend - save new object, labels & any other image changes to DB
• [ ] make label coloring more intelligent
• [ ] Add iteration option: include/skip invalidated labels (would mean we probably need to show them in the images table too)
• [ ] ability to select multiple images in image table and perform mass actions on them (add label to every object in them)

[nathanielrindlaub]

• [ ] Improve styling of label pills/objects in table - make difference between locked/unlocked label pills more clear
• [ ] Improve styling of bounding boxes - make currently focused bounding box more clear
• [x] Think about how to validated/invalidate empty images...
  • maybe if Megadetector doesn't return and object (or just by default), we set an object with an "empty" label on the entire image, that can than be validated/invalidated like any other? Kind of stretching the word "Object"... maybe use "detections" instead?

[nathanielrindlaub]

See https://github.com/tnc-ca-geo/animl-frontend/issues/22 and https://github.com/tnc-ca-geo/animl-api/issues/31 for thoughts on how to go about validating/invalidating empty images

[nathanielrindlaub]

Calling this done. Breaking out the incomplete tasks into separate issues.