Ability to group Child issue (formerly "Issues in this Epic")

Problem

Currently, we can add a lot of child issues to an Epic, but it's not possible to organize them to get a better visibility (when using Classic projects + New issue view it's not possible to change the order of the child issues) and there is no option to group the issues by priority, created date, issue type, sprint.

Suggestion

The ability to group the child issues by Sprint would allow us to have visibility of the feature schedule without having to find the Epic in the Backlog view and select it there.