Option to close all issues when epic is closed
It would be useful if there was a toast message that appears after you close an epic that asks if you want to close all epic issues as well. This is probably more rare than closing all issues and then auto-closing the epic, but in my case I closed an abandoned epic and then had to click through and manually close each issue, which can be time-consuming.
Relevant slack thread: https://gitlab.slack.com/archives/C72HPNV97/p1539797229000100