[gnome-software] (9 commits) Created branch wip/william/cherry-pick

[William Hua <williamhua src gnome org>]

The branch 'wip/william/cherry-pick' was created.

Summary of new commits:

  18aa914... trivial: Add provenance and is_free in gs_app_to_string
  3b7ca13... trivial: Guard against self-setting origin
  8640681... trivial: Allow arbitrary variables to be read from /etc/os-
  dacc070... De-dup based on source
  350dd39... Hide licence, updated and category fields if they aren't se
  e84e435... Non-live updates are updatable but not updatable-live
  ad47380... Disable the update all button during an update
  dcc87ce... trivial: Send notification only once
  2b09a9a... trivial: Remove dpkg from list of conflicts for packagekit-