mantisbt-plugins/announce — pull request #3 by Bascy (2014-03-18 15:53:24+00:00)
Title: Added timestamp of dismissal, allowing edited messages to appear again

When a message is edited, its timestamp is altered to the current time.
When a message is dismissed by a user in a context, the time of dismissal is also recorded.

Messages that are altered after dismissal by a user, reappear in the list of visible messages for that user