Show Merge Request Information in Issue List

Description including problem, use cases, benefits, and/or goals

If you have a lot of issues, you loose very quickly the possibility to see which issues are already awaiting a merge from the related merge request. Therefore it would be great if there is a information in the issue list

• if it is related to a merge request (the information is already there for an issue in the issue details)
• what is the status of this merge request

Proposal

To achieve this goal, there is only a small modification necessary in the issue list. Here is again a small example of how it could work. You can see at the right area now the related merge request (as a link) with the status of it (if there is a related merge request)

Design

• No linking to actual merge request for now (perhaps in a follow up issue)
• Just show amount of related MR's (Open Merge request's that will close this issue?)

svg icon used: icon-merge-request_unmerged.svg

/cc @smcgivern