[gnome-shell] (21 commits) Non-fast-forward update to branch wip/fmuellner/gtk4

[Florian Müllner <fmuellner src gnome org>]

The branch 'wip/fmuellner/gtk4' 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:

  0671fb1... shew: Use Xlib to set transient hint
  4e4210d... extensions-app: Remove stray angle brackets
  d617a7a... extensions-app: Set title on window instead of headerbar
  223c568... extensions-app: Use consistent style for property names
  3427c3d... extensions-app: Don't use deprecated margin-left/right prop
  d788952... extensions-app: Stop using :margin shortcut
  15e7611... extensions-app: Don't keep ref to main window
  3300a94... extensions-app: Clean up when window is unrealized
  9391fe4... dbusServices/extensions: Minor cleanup
  cfdc693... dbusServices/extensions: Set title on window instead of hea
  ae630ce... dbusServices/extensions: Use consistent style for property 
  63e7122... dbusServices/extensions: Stop using :margin shortcut
  5dd1bc1... dbusServices/extensions: Stop using GtkContainer API
  06682a1... dbusServices/extensions: Stop using GtkToolbar
  00d872a... dbusServices/extensions: Stop stacking frames
  bda9713... dbusServices/extensions: Remove event box
  d69607e... Port extensions app and portal to GTK4

Commits added to the branch:

  96dc6d1... windowManager: Check whether metaWindow is NULL after destr (*)
  e8893f4... ci: Bump ci-fairy template include (*)
  3fb0284... Make sure to allocate all children in allocate vfuncs (*)
  a314c05... workspace: Handle child not being present in the window slo (*)
  b64201f... shew: Use Xlib to set transient hint
  28046eb... extensions-app: Remove stray angle brackets
  4864c30... extensions-app: Set title on window instead of headerbar
  48416d3... extensions-app: Use consistent style for property names
  8975db2... extensions-app: Don't use deprecated margin-left/right prop
  acb518a... extensions-app: Stop using :margin shortcut
  16115d8... extensions-app: Don't keep ref to main window
  d0b810b... extensions-app: Clean up when window is unrealized
  d5601fc... dbusServices/extensions: Minor cleanup
  30c15ea... dbusServices/extensions: Set title on window instead of hea
  68f14f4... dbusServices/extensions: Use consistent style for property 
  31a0c92... dbusServices/extensions: Stop using :margin shortcut
  e1d6b9c... dbusServices/extensions: Stop using GtkContainer API
  4e81c29... dbusServices/extensions: Stop using GtkToolbar
  e1da04d... dbusServices/extensions: Stop stacking frames
  24b93b6... dbusServices/extensions: Remove event box
  6dc16d5... Port extensions app and portal to GTK4

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