#17284 Edit form does not cancel correctly

What does this MR do?

Replaces the markdown textarea with the currently saved note text when the note edit is cancelled.

Are there points in the code the reviewer needs to double check?

No

Why was this MR needed?

Allows the user to revert back to the original note text, as expected, using cancel.

What are the relevant issue numbers?

Fixes #17284 (closed).

Screenshots