MS: Referencing to other objects via "@" sign #5423

[zetaopsbot]

Users should be able to mention other users by prefixing that users name with a "@" sign. That prefixed username "eg: @evrenesat" should be a link to the profile page of the user. Mentioned user should be informed with a notification message about the mention.

Same mechanism should be usable for other custom models if needed.

zengine