Comment 2 for bug 1817287

FWIW from a flatpak point of view this passes the relevant parts of the test plan on bionic and some exploratory testing :-) I'll continue checking that nothing has regressed.

I tested this with the following versions

$ apt policy flatpak xdg-desktop-portal xdg-desktop-portal-gtk
flatpak:
  Installed: 1.0.7-0ubuntu0.18.04.1
  Candidate: 1.0.7-0ubuntu0.18.04.1
  Version table:
 *** 1.0.7-0ubuntu0.18.04.1 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic-updates/universe amd64 Packages
        500 http://security.ubuntu.com/ubuntu bionic-security/universe amd64 Packages
        100 /var/lib/dpkg/status
     0.11.3-3 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
xdg-desktop-portal:
  Installed: 1.0.3-0ubuntu0.1
  Candidate: 1.0.3-0ubuntu0.1
  Version table:
 *** 1.0.3-0ubuntu0.1 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic-proposed/universe amd64 Packages
        100 /var/lib/dpkg/status
     0.11-1 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages
xdg-desktop-portal-gtk:
  Installed: 1.0.2-0ubuntu1.1
  Candidate: 1.0.2-0ubuntu1.1
  Version table:
 *** 1.0.2-0ubuntu1.1 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic-proposed/universe amd64 Packages
        100 /var/lib/dpkg/status
     0.11-1 500
        500 http://gb.archive.ubuntu.com/ubuntu bionic/universe amd64 Packages