Similar to tasks add option to show how many related issues are closed
Description
An optional indicator displaying "X of Y related issues closed" similar to issues which hold (markdown defined) tasks where it displays "X of Y tasks completed".
Proposal
An issue that has some tasks (defined via markdown checkboxes) automatically displays an indicator like "0 of 2 tasks completed" in the issue list and on the particular issue page as well.
I'd like to have an option to enable another optional indicator for the number of related issues that have been closed. The reason is the following: Since the CE version does not provide the ability to define Epics I have introduced a custom tag for Epic issues and add the respective User Stories as related issues which get added to the "Related issues" box. In order to track how many related issues are closed yet I'd have to go through the list and count the number of either green or blue icons indicating whether the issue has been closed yet.
As a workaround I am currently adding a redundant task list to an Epic which holds all related issue in order to have the task indicator display how many issues have been closed yet. Unfortunately one has to create the list redundantly and update it manually all the time.