[gtk+] (10 commits) Non-fast-forward update to branch wip/baedert/drawing

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/drawing' 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:

  3796553... expander: Inherit from GtkContainer
  23c2745... sizerequest: Make size groups "work"
  246ca64... checkmenuitem: Stop using the parent's gadget
  ac9b770... menuitem: Remove gadget
  70b2ade... boxgadget: Remove unused ComputeExpandFunc
  5448e45... popover: Stop looking at padidng and border in measure
  56bedd1... widget: Special-case popover in snapshot
  810d95d... inspector: Show the GdkWindow before grabbing
  d4c7a46... spinbutton: Fix activation
  544f0d9... == Merge into expander commit
  7505937... spinbutton: Add accessors for (max-)width-chars

Commits added to the branch:

  17ffd2b... expander: Inherit from GtkContainer
  a835bac... sizerequest: Make size groups "work"
  193aa59... checkmenuitem: Stop using the parent's gadget
  cf88e48... menuitem: Remove gadget
  85730d6... boxgadget: Remove unused ComputeExpandFunc
  5343c89... popover: Stop looking at padidng and border in measure
  0cc7397... widget: Special-case popover in snapshot
  bca3723... inspector: Show the GdkWindow before grabbing
  07f7273... spinbutton: Fix activation
  6baa232... spinbutton: Add accessors for (max-)width-chars