Provide UI feedback when app is filtered to a certain region / site #272
Description
The user needs some visual confirmation, perhaps on the left side panel, to remind them that the data in the app has been filtered (from the "Settings" modal).
To do this, we'd need to keep track of when the sites in filtered_data is different than merged_data.
And when an entire region is selected, It'd be preferable to just state:
Regions selected:
- [ ] Netherlands
- [x] Germany
- [x] USA
However, not all sites within a region are selected. The feedback could be more specific, such as
Regions selected:
- [ ] Netherlands
- [x] Germany
- [-] USA (Site 1, Site2, Site3)
That way, we are staying consistent with the [-] meaning that only some sites are available from the USA region.
In general, our users don't ever use this filtering feature... even tho they do split up their work by region... I don't really know why. Maybe because they like seeing "All patients" when they toggle "All patients". But there was a recent use case brought up that may change that for us... i.e. they will start using this filter feature more.