Indefinite spinner under certain conditions for cohort selection

[fedorov]

To reproduce, select the items in the screen. Per @s-paquette it is a zero count exception.

[pgundluru]

Another instance

[pgundluru]

In this case, I selected all non Zero collections and one Zero count filter in body part

[G-White-ISB]

My understanding is that the condition producing the indefinite spinner state is that the filters are selected which return an empty cohort. In that case there are errors generated client side in the ajax calls to update the facet counts and populate the tables. I have updated code in the expr branch to handle the errors gracefully for generating the facet counts and populating the tables. So these conditions should no longer produce this state. I am not sure if manifest downloads may still cause a problem

[s-paquette]

@fedorov @pgundluru Now available for testing. This will:

• Automatically check 'hide zeros' for all 3 categories that have it as an option when the page loads
• If a user selects a filter which brings the total to zero, they will receive an alert message letting them know
• If a user selects a filter which brings the total to zero, the 'download images' and 'save cohort' buttons are disabled.

[pgundluru]

The following are tested in test tier
Automatically checks zeros - Success
Select filters and see a message - Success
Download images and save cohort are disabled - success