When a feature is added to a release, automatically set the start date of an epic/feature to the release's start date

As a contributor, I would like to be able to set the start date of an epic or feature to the start date of a release when a feature is added to a release so that charts and roadmaps make sense.

I would also like to have the capability to set the due date based on the start date. Currently the only option to set the start date or due date is an interval from today based on a trigger event. This would be useful for iteration planning and can be accomplished with a bulk edit, but would be more efficient to be set programmatically.