Comment 4 for bug 1804448

gnome-shell --replace works fine now. I don't have a multi-monitor setup to complete the verification so I will keep the relevant tags.

```
apt-cache policy gjs mutter
gjs:
  Installed: 1.54.3-1~ubuntu18.10.1
  Candidate: 1.54.3-1~ubuntu18.10.1
  Version table:
 *** 1.54.3-1~ubuntu18.10.1 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     1.54.1-1 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic/main amd64 Packages
mutter:
  Installed: 3.30.2-1~ubuntu18.10.1
  Candidate: 3.30.2-1~ubuntu18.10.1
  Version table:
 *** 3.30.2-1~ubuntu18.10.1 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic-proposed/main amd64 Packages
        100 /var/lib/dpkg/status
     3.30.1-1 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic/main amd64 Packages
```