Epic Filtering within Plan mode

Additional filtering of 'Epic' items to remove issues not connected with an epic.

Current -
Selecting each epic in the left panel of the plan board will reduce the backlog to the associated issues for that epic. On a large backlog it does not demonstrate the rank of these issues

Preferred -
Right-click option on the backlog to 'Grey non-epic issues'. This would allow the backlog to be displayed, demonstrating the ranking, while making epic associated issues easy to identify. This is demonstrated in the attachment.