Enable @mentions functionality inside comments
Is User A creates a task and assigns it to User B, both users will automatically be following the task and would receive notifications based on their personal settings.
However, is User B posts a comment to the task and wants to ask user C for their views on that one comment, there is no easy way for User C to be notified. Typically User C would not be following the task because up to that point they have no reason to do so.
The only way I know to do this would be for User B to first re-assign the task to User C and then post the comment, hoping that User C's notification settings would trigger a notification. This is a cumbersome 2-step process and does not work if User B wants to consult more than one other user (since the same task cannot be assigned to multiple users).
It would be great if User B could simply enter one or more @username mentions in the comment and know that the system would send a notification to the named user(s).