R1:1493f08272dc

Emit resize events after making document changes during inline editing

Summary:
Ref T12634. Fixes T12633. These events allow the keyboard reticle to resize properly.

(I expect to possibly hide/disable the reticle in the future during edits, but at least make the behavior sensible for now.)

Test Plan:
- Used "n" to select a block.
- Clicked a line number in that block to start a new inline comment.
- Saw reticle resize properly.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T12634, T12633…