[gnome-shell] (13 commits) Non-fast-forward update to branch wip/fmuellner/border-transparency-fix

[Florian Müllner <fmuellner src gnome org>]

The branch 'wip/fmuellner/border-transparency-fix' 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:

  c9a6167... st: Avoid integer overflow on unpremultiply

Commits added to the branch:

  27c660d... theme: Replace page indicator assets with css (*)
  4d2dce2... theme: Drop custom assets for window close buttons in overv (*)
  10b3671... shell: Use MetaStartupNotification (*)
  cdb8ac3... shell: Hide/drop unused public API (*)
  2640507... meson.build: Bump compatible mutter API version to 4 (*)
  3217c10... theme: Replace calendar arrow images with symbolic icons an (*)
  4c11d15... st-button: Ignore pointer emulated touch events (*)
  0e0574a... iconGrid: Eliminate JavaScript for painting/picking (*)
  25fbffc... Update Esperanto translation (*)
  121c427... Updated Slovenian translation (*)
  4d649d6... Updated Spanish translation (*)
  6743c18... StWidget: don't forget to invalidate the paint state if not (*)
  925a25d... st: Avoid integer overflow on unpremultiply

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