The new delayed notifications for "change" events from MarkdownEditor

could result in text being chopped off if typing and saving within half

a second. We now make sure to always set the latest-and-greatest text

when saving, instead of relying on the handler for the "change" event.
This only occurs in the comment dialog.

Typed and hit enter quickly, and saw the text appear. Before, I could

reliably reproduce the missing text issue.