[web] Introduce member action callbacks in ThreadMember component

Summary: Introduce callbacks in menu in ThreadMember component - the same that are used in mobile app.

Test Plan: The actions can be tested after introducing memebrs modal

Reviewers: palys-swm, benschac, atul

Reviewed By: palys-swm

Subscribers: ashoat, palys-swm, Adrian, atul, karol-bisztyga, benschac

Differential Revision: https://phabricator.ashoat.com/D3382