Quick action preview renderring does not list commands nicely

Summary

The preview rendering of quick actions does not handle multiple commands nicely. It would be nice it they were split with '<br>' instead of ' '.

Steps to reproduce

Open an epic and enter the following into the comment box

/label ~Pyph 
/unlabel ~Brins 
/child_epic &4 
/parent_epic &2 
/title Some new title

Preview the markdown and you'll see something like this

Changing the join to <br> produces much easier to read action previews