[gnome-games] (9 commits) Non-fast-forward update to branch wip/exalm/subprocess

[Alexander Mikhaylenko <alexm src gnome org>]

The branch 'wip/exalm/subprocess' 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:

  1c43fcc... tmp: flatpak: Use subprocess branch of retro-gtk
  7aa3c90... retro: Adapt to API changes in retro-gtk
  86530ba... meson: Bump retro-gtk API version
  aea45d1... retro-runner: Remove game-init and game-deinit signals
  de15ae9... error-display: Support showing crashes
  2e043a5... display-view: Handle runner crashes

Commits added to the branch:

  41f20e0... css: Drop content-view style (*)
  617d481... ui: Use 'backdround' class, drop 'solid-background' (*)
  ae68f39... css: Swap sidebar colors (*)
  308e5ec... tmp: flatpak: Use subprocess branch of retro-gtk
  17a4a4a... retro: Adapt to API changes in retro-gtk
  8b59b9c... meson: Bump retro-gtk API version
  365721c... retro-runner: Remove game-init and game-deinit signals
  62992c6... error-display: Support showing crashes
  298cb21... display-view: Handle runner crashes

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