[gnome-games] (8 commits) Non-fast-forward update to branch wip/exalm/platform-preferences

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/platform-preferences' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  98ca45d... ui: Use HdyLeaflet in preferences window
  4ba115b... ui: Add PreferencesSidebar
  9d59f84... preferences-window: Use PreferencesSidebar
  d803331... core: Add compare() to Platform
  090a9e2... core: Add PlatformRegister
  73896b8... ui: Register platforms for libretro simple types
  9362465... plugin: Add get_platforms()
  afa34bb... ui: Register plugin platforms
  8dae183... plugins: Register platforms

Commits added to the branch:

  df022b7... core: Add compare() to Platform
  8ebd421... core: Add PlatformRegister
  15359b9... ui: Register platforms for libretro simple types
  1b41aa6... plugin: Add get_platforms()
  7568203... ui: Register plugin platforms
  cda3d98... plugins: Register platforms
  0c1c598... preferences-page: Add 'title' property
  e17017e... preferences-window: Add pages programmatically