Covid single variant page: make collections respect unapplied filters

[fengelniederhammer]

What currently works is:

• change the date range (e.g. last year to all times)
• apply the filter
• select a collection

-> The collection is shown with the correct date range.

What currently doesn't work is when you don't apply the date range filter:

• change the date range (e.g. last year to all times)
• (do not apply the filter)
• select a collection

-> The collection is shown with the previous date range.

This should be changed such that the collections are integrated into the same React island as the rest of the filters section, so that they can access the current state.