[gnome-shell] (11 commits) Non-fast-forward update to branch gbsneto/effects-paint-nodes

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

The branch 'gbsneto/effects-paint-nodes' 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:

  bfbe8d1... blur-effect: Port to paint nodes
  29b4859... lookingGlass: Port to paint nodes

Commits added to the branch:

  ecdf62d... st/viewport: Invalidate transform when it changes (*)
  770231c... st/image-content: Implement GIcon interface (*)
  d7cb2ee... st/texture-cache: Return a GIcon from bind_cairo_surface_pr (*)
  86b5a43... shell/app: Add new get_icon() method (*)
  482c655... messageTray: Remove SourceActorWithLabel class (*)
  918b3ee... st/theme-node-transition: Pass actor when constructing time (*)
  4aabcd9... shell/global: Adapt to after-paint signal type signature (*)
  5ea5442... st/adjustment: Add ::actor property (*)
  7523562... background: Use actor.content.background (*)
  d69feea... blur-effect: Port to paint nodes
  482040f... lookingGlass: Port to paint nodes

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