[web] render thread avatars in thread subchannel/sidebar modals
Summary:
Rendered thread avatars in thread subchannel/thread sidebars modals. There were no official designs for these; however, I synced with ted about this last week and he gave me his stamp of approval
Depends on D7210
Test Plan:
Please view the screenshots below to see the changes I made:
Subchannels:
Before:
After:
Subthreads:
Before:
After:
Reviewers: ashoat, atul
Reviewed By: atul
Subscribers: ashoat, tomek, atul
Differential Revision: https://phab.comm.dev/D7275