Store WSI Preds User Feedback in IndexedDB, then commit to Box at certain intervals

[PrafulB]

Instead of making an update to Box every time user provides feedback on a WSI prediction, store it in IndexedDB when the feedback is first provided, then commit it to the Box WSI predictions file itself either on image change, app close or in certain intervals. This will remove the need to have separate files for each user's feedback as well as having to compare each model prediction with user feedback when first fetching the two from Box and storing in IndexedDB.