[web] Make drawer items not expandable in the calendar tab

Summary:
issue: https://linear.app/comm/issue/ENG-2789/make-drawer-items-in-calendar-tab-not-expandable
The new designs specify, that drawer items are not supposed to be expandable in the Calendar tab.

Test Plan: Run the web app, check that drawer items are not expandable in the Calendar tab, but stay expandable in outher tabs.

Reviewers: tomek, przemek, michal, bartek

Reviewed By: tomek

Subscribers: ashoat, atul

Differential Revision: https://phab.comm.dev/D6363