Sprints

Teams using JIRA Agile Scrum Boards group issues into Agile Sprints which have a basic workflow (states):

The add-on show those statuses on the issues displayed on the tree structure:

An icon tooltip shows the current status: Future or Active as well as all the closed sprints which the issue belonged to.
The Sprint filter allows users to filter by:

No Sprint: the issue does not belong and did not belong to any sprint at any time
Closed: all the sprints belonging the issue are closed
Future and Active: Are they are dynamically populated (with the name of the sprint).