"Parent for" in relations to Related issue

[marcin-p]

Hi
It could be really helpful if adding relation in story for Related issue will be e.g. "Parent for" other stories. Then stories could be connected like "parent"<>"child". It is helpful for big stories, not implementable in one sprint.
Effort estimation in parent story could be summary of estimations from child stories.
The same for Spend time and remaining hours.
Best regards
Marcin