issue: https://linear.app/comm/issue/ENG-2793/make-calendar-filters-change-on-drawer-action
We want pressing on a community drawer item, in the calendar tab, to result in only events from chats from that community being displayed, and additionally only chats from this community being present in
the filter panel.
CalendarDrawerItemHandler is a component, that provides a handler object, that has the onClick function for the drawer items for the calendar tab (D6287). This diff changes what this 'onClick' function does, to satisfy the requirement from above.

Run web app, checked that pressing on an item in the community drawer results in only events from chats from that community being displayed, and only chats from this community being present
in the filter panel.