[gnome-games] (10 commits) Non-fast-forward update to branch wip/exalm/spinner

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/spinner' 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:

  53b9db3... application-window: Wrap titlebar into a HdyTitleBar
  d525cdf... ui: Apply devel style to HdyTitleBar instead of headerbars
  068d22a... sidebar-view: Add existing items when changing model
  8d0900a... collection-icon-view: Only call model.get_n_items() once
  913987a... ui: Add loading state
  3d4f02f... ui: Use loading state instead of loading notification
  6817c03... ui: Remove loading notification
  99ce835... fixme: A hack for crossfade
  3f7a9de... application-window: Bind model only after loading
  0860d82... Temporarily disable MAME plugin

Commits added to the branch:

  939062e... build: Disable MAME plugin by default (*)
  4125a2a... application-window: Wrap titlebar into a HdyTitleBar (*)
  820d578... ui: Apply devel style to HdyTitleBar instead of headerbars (*)
  299e899... sidebar-view: Add existing items when changing model
  f4e9e94... collection-icon-view: Only call model.get_n_items() once
  65ce0bc... ui: Add loading state
  5a07fc5... ui: Use loading state instead of loading notification
  8db4c9c... ui: Remove loading notification
  9d5f15a... fixme: A hack for crossfade
  1da61fc... application-window: Bind model only after loading

(*) This commit already existed in another branch; no separate mail sent