1. When clicking one filter, it makes others in other categories disappear. Eg Podcast makes International Development below disappear but leaves International Travel. Seems like a bug.

Instead, we want only other top-level categories WITHIN a filter group to disappear. Eg select Blind/Low vision = only opens the sub-categories, the rest in that group= hide. An "ALL" should always remain to allow the user to 'get back'. 


2. Items with sub-categories should just open and show sub (no need for the + sign on the right-- that looks strange and probably not accessible). 

