Allow Feature IDs to be hidden in a Gantt chart

The Gantt charts are great for planning out work, but we often need to show them to clients.  In this situation, an automatically generated ID that often bears no relationship to the order in which it's being executed doesn't add any value and can cause confusion.

If possible, I'd like to be able to toggle the Feature IDs on or off where they are currently listed on the left hand side of the Gantt chart in the same way that I can toggle on/off the assignees of the feature