[gnome-games] (21 commits) Non-fast-forward update to branch wip/exalm/libhandy2

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/libhandy2' 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:

  45fc128... preferences-page: Add 'title' property
  dd282ff... ui: Add PreferencesSidebarItem
  1763ad2... ui: Add PreferencesSidebar
  72cc450... preferences-window: Use PreferencesSidebar for sidebar
  d75bc2a... preferences-window: Drop page child properties
  241aebb... preferences-window: Don't show menu in headerbar
  6d0006d... preferences-window: Add back button
  3b84145... preferences-window: Wrap into HdyLeaflet

Commits added to the branch:

  6c79705... steam: Stop parsing node after a closing bracket (*)
  7ae98d1... Fetch metadata for Steam games (*)
  4bd4e2f... Revert "Fetch metadata for Steam games" (*)
  456f75d... developer-list-item: Extend ListBoxRow instead of Label (*)
  7dd8094... platform-list-item: Add compare() function (*)
  01e3ec8... platform-list-item: Extend ListBoxRow instead of Label (*)
  f23208b... collection-box: Update filtering text on view change (*)
  63c79ae... collection-box: Remove unnecessary brackets (*)
  549773c... collection-icon-view: Check filtering text for null (*)
  06a2b0b... collection-header-bar: Update primary menu layout (*)
  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 (*)
  066b4a2... preferences-page: Add 'title' property
  2c146b9... ui: Add PreferencesSidebarItem
  fc10e37... ui: Add PreferencesSidebar
  8787d28... preferences-window: Use PreferencesSidebar for sidebar
  0c64a64... preferences-window: Drop page child properties
  62ec810... preferences-window: Don't show menu in headerbar
  ffc1028... preferences-window: Add back button
  60a36f0... preferences-window: Wrap into HdyLeaflet

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