[gnome-software] (23 commits) Created branch wip/william/cherry-pick-4

[William Hua <williamhua src gnome org>]

The branch 'wip/william/cherry-pick-4' was created.

Summary of new commits:

  c4417a3... Add utility module for snapd
  5f3c3fb... Add Ubuntu One sign-in UI
  ed1a3f3... Add utility module for Ubuntu One
  92fa79d... Add an apt plugin that works with aptdaemon
  eb8b368... Add a snappy plugin
  a071749... Add gs_os_release_get_ubuntu_codename
  a172789... Fix Ubuntu reviews plugin
  25af7c3... Override button theming to show progress meter
  75307e8... 'Software Sources' -> 'Software & Updates' in menu
  f2fb11b... Don't use notification actions under Unity
  41452dd... Use minimal limits for review content
  ee053be... De-dup based on source
  2c8ffa2... Format update descriptions to be suitable for Ubuntu.
  03f5b67... Allow transition from AS_APP_STATE_INSTALLED to AS_APP_STAT
  083ae8c... Allow AS_APP_STATE_INSTALLED to AS_APP_STATE_INSTALLING
  f0b5a75... Refresh appstream index if needed
  7bbd45a... Hide license, updated and category fields if they aren't se
  fae6ee5... Update kudo hiding code
  ab16bac... Disable history button
  5cb94ba... Sort snaps before other apps
  c556e29... Remove dpkg from list of conflicts for packagekit-refresh
  4c9b729... Non-live updates are updatable but not updatable-live
  c28cf04... provenance: Order after apt so we have the origin set