Include Milestones in the expanded Release names section of the Epics Gantt Chart

Many companies use milestones to represent when a set of work items is to be delivered and these are only loosely coupled or decoupled from longer-term planning time boxes, which in Aha are best represented by Releases (e.g. quarterly time boxes).

The Epics Gantt Chart view is useful for seeing a timeline view of Epics and their Features, including any dependencies. The ability to view milestones (associated with an Aha Release time box) would significantly improve the value of this Gantt view.