[web] Display loadingSpinner over EditUserAvatar when change in progress
Summary:
Show a loading spinner over EditUserAvatar when a save is in progress. Pretty straightforward. In next diff I'll quickly "disable" the edit button as well.
Depends on D8260
Test Plan:
Looks as expected:
Reviewers: ashoat, ginsu, rohan, inka, kamil, michal
Reviewed By: kamil
Subscribers: tomek
Differential Revision: https://phab.comm.dev/D8261