[web] Change active thread when current thread info changed

Summary: When new thread is created from pending, we need to update navInfo in state with active chat thread id

Test Plan: Create sidebar by sending message to pending, and see if there are no duplicate sidebars in chat thread list, check if messages and time are correct

Reviewers: palys-swm, KatPo

Reviewed By: palys-swm, KatPo

Subscribers: ashoat, zrebcu411, Adrian, atul, subnub

Differential Revision: https://phabricator.ashoat.com/D891