Fix Batch AOI stats

[vgeorge]

Contributes to #132.

Changes:

• Display stats of batch AOIs in the secondary panel
• Disable prime button if a prediction was already made for AOI, Mosaic & Checkpoint combination
• Disable prime button if batch is already running
• Never display Class distribution metrics are not available, hide the panel instead

@LanesGood this is ready for review. To test, try opening a finished batch AOI, switch between AOIs and confirm the stats are displayed accordingly.

[LanesGood]

@vgeorge I'm a bit confused. I tested with a new batch prediction - please see the below.

Some minor changes perhaps could be useful:

• I can see that the "Run batch prediction" button is still active when my currently selected batch is not yet running. (Strangely the "processing" notification never activated, but the prediction finished.)

My batch prediction returned, but the secondary stats panel doesn't load:

Reloading the browser window, I can see the class stats should be there:

Initially when I reloaded, the secondary panel didn't appear. My screenshot for this didn't save. I'll try to reproduce.

Reloaded after new AOI:

• I can properly see the Class Stats

[LanesGood]

The conditional check for bounds (or totalArea, whatever we want to call it) should remain; this ensures that the table header is used only for the class distribution chart and not the class F1 chart. Here's the view in this branch with the current code:

[LanesGood]

keep conditional check - only need this column of data on the class distribution chart, but the component is also used for class F1 scores

[LanesGood]

@vgeorge I added a change to keep the land area in the compare and share pages' class analytics charts. Not sure if best practice to execute the areaFromBounds function in the chart component, or before passing the prop through; I did it in the component. Will defer to you on the conditional check - I'm not sure if we should separate out the component logic more clearly or if the original check I had implemented is adequate.

[vgeorge]

@LanesGood I added changes on how the batch status is controlled internally. Now there is a specific machine to control its state. I haven't gotten to the issues you reported, but it would be nice if you could review this again, specifically the batch panel behaviour.

[LanesGood]

1. I see the "Batch prediction starting" button
   

2. I see the batch progress in the button! Remarkably fast, so while I saw the progress increasing I didn't actually snap a screenshot of it in time. 🎉

3. Batch finishes but does not render 😞
   
   Console of state machine exposes this: ckpt: undefined | aoi: 145 | tmf: undefined | msc: a1b11210f9ecc3fdc461c9379d6f0d53

Reloading, I can see the batch predictions:

@vgeorge I think we should call this PR good - it achieved the "fix batch aoi stats" goal and is successful. The rendering is something else. I also think that the expected behavior is usually that users start a batch and return to that page later, so that may be why the immediate rendering of the batch AOI predictions is not inherent already.

I do see that the "run batch prediction" button is still active on a selected AOI when nothing has changed - this isn't captured by your test cases but perhaps we can flag for future enhancement,

[vgeorge]

@LanesGood thanks for the review! I've incorporated some of your suggested changes and added a commit to fix the styles in the secondary panel. I'm going to merge this now. Let's track any new issues in the panel with separate tickets.