For some reason, this question doesn't have a flag "as duplicate" option:

https://askubuntu.com/questions/751268/how-to-run-graphical-app-in-background-mode

It has been put "on-hold" because the user was having a small problem with translation which only became clear once the answer was accepted.   I have revised the question based on the accepted answer, but also need to flag it as duplicate because it's actually a duplicate of this question:

https://askubuntu.com/questions/562911/how-to-execute-a-task-in-background?rq=1

**Is it because it's "on-hold"?  If so, why can I not flag an "on-hold" question as duplicate?**