Ensure users can switch between multiple checkpoints on same AOI and timeframe

[LanesGood]

Switching between checkpoints on the same AOI and timeframe is successful the first time, but doesn't always result in the expected behavior/load of prediction tiles on subsequent switches. A reload of the application window is sometimes required. What is the best way to debug this?

[LanesGood]

Any time you switch checkpoints, we need to sure that we are loading a valid checkpoint on a valid timeframe on a valid AOI on that instance. Otherwise, retraining will fail.

Mosaic selector box - "this checkpoint doesn't have any predictions, you must select a mosaic and run first prediction"