[web] Change the name of communityIDFilter field to calendarPickedCommunityID

Summary:
In D6457 I was asked to change this fileds name. Like I expressed there, it would take a lot more time to chaneg this by chagin it in each diff separately, and rebasin the whole stack, so I hope my
doing this in a separate diff is fine.

Test Plan: Run web app, check that pressing a drawer item in the calendar tab changes available filters and events.

Reviewers: michal, kamil, kuba

Reviewed By: michal

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D6731