[gnome-shell] (23 commits) Non-fast-forward update to branch wip/fmuellner/skip-taskbar-quit

[Florian Müllner <fmuellner src gnome org>]

The branch 'wip/fmuellner/skip-taskbar-quit' 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:

  08187ba... app: Close all closable windows from quit()

Commits added to the branch:

  c2e9e68... Bump version to 3.30.0 (*)
  afc7925... objectManager: correct invalid index code in onNameVanished (*)
  96c5404... objectManager: correct other invalid index code in onNameVa (*)
  542f971... theme: Remove unused assets (*)
  3033506... dnd: Nullify _dragActor after we've destroyed it, and avoid (*)
  87da623... messageList: stop syncing if closeButton has been destroyed (*)
  9c41736... automountManager: remove allowAutorun expire timeout on vol (*)
  5bca4a8... calendar: chain up to parent on _onDestroy (*)
  0fe5a3c... viewSelector: Cancel search on overview hidden (*)
  c47a740... search: Cancel search provider operations on clear (*)
  7604060... search: Ignore search provider results metas if search is c (*)
  5b3ff71... extensionSystem: Don't load an extension with invalid style (*)
  3aea290... extensionSystem: Unload stylesheet if extension is not load (*)
  30cb212... js/main: Throw error if no valid default stylesheet is foun (*)
  72f5802... extensionSystem: Unset stylesheet file reference when unloa (*)
  5d61e25... network: Don't assume the active connection has been proces (*)
  1bdb3f1... Update Belarusian translation (*)
  2253138... theme: define proper :hover and :active states (*)
  9e975ed... Update Russian translation (*)
  7778d1c... Update Dutch translation (*)
  2d791a5... windowMenu: Port from Meta.ScreenDirection to Meta.DisplayD (*)
  b087752... windowManager: listen actively to windows being destroyed d (*)
  87a645a... app: Close all closable windows from quit()

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