[native] fix rendering of edit thread description setting button

Summary:
Pretty much the same thing as D7588 but for the thread description

Depends on D7588

Test Plan:
Please see the demo videos below to see the changes I made

Before:

After:

Reviewers: ashoat, atul

Reviewed By: ashoat

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D7589