[gtk+] (7 commits) Non-fast-forward update to branch wip/cosimoc/toolbar-gadget

[Cosimo Cecchi <cosimoc src gnome org>]

The branch 'wip/cosimoc/toolbar-gadget' 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:

  a4ec272... toolbar: trivial code cleanup
  593a12e... toolbar: use gtk_container_handle_border_width()
  32852cb... toolbar: port to use a gadget
  de66402... toolbar: deprecate GtkToolbarSpaceStyle and space-style sty
  7a4637e... separatortoolitem: trivial code cleanups
  193b15b... separatortoolitem: don't use custom sizing/rendering

Commits added to the branch:

  f357ef5... scrolledwindow: add missing deprecation flag (*)
  3046a30... toolbar: trivial code cleanup
  5be2aa2... toolbar: use gtk_container_handle_border_width()
  964274e... toolbar: port to use a gadget
  8784cac... toolbar: deprecate GtkToolbarSpaceStyle and space-style sty
  091c15f... separatortoolitem: trivial code cleanups
  9fb179c... separatortoolitem: don't use custom sizing/rendering

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