R1:468aabd4ef30

When draft inline comments are submitted, disengage the editor

Summary:
Ref T13513. If you submit top-level comments while an inline comment editor is open, kick the comment out of the editing state.

(An improvement to this behavior would be to warn the user that we're going to do this first, but this is currently less straightforward.)

Test Plan:
- Clicked a line number to create an inline.
- Type text, save, click edit.
- (Optional: reload page.)
- Save changes overall using the form at the…