[gtk+] (18 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:

  8893239... box: Ignore baselines when vertical
  1f68b2a... centerbox: Add some missing return value annotations
  50eb4e8... fix a few documentation problems
  fdc3a8f... notebook: Allocate unmapped tabs
  0c0c4bb... widget: Move get_resize_needed to gtkwidget.c
  ba1d141... testpopover: Remove expand GtkBox child properties
  6b93e8b... Fix a few documentation issues
  1538391... widget: Draw css box after pushing a opacity node
  5b4db2c... popover: Add a contents node
  231b247... widget: Remove gtk_cairo_transform_to_window
  9d9c641... window: Fix annotations in get_size and get_position
  f032293... gtkapplication: g_dbus_proxy_new_sync can return NULL
  6d1a26f... window: Fix resizing with solid-csd
  522ef3e... widget: Fix a widget/container mixup
  ae15fcd... widget: Fix priv dereference in size_allocate_with_baseline
  cb12674... widget: Don't propagate size-allocate if only the position 
  cae5355... widget: Add baseline and out_clip parameters to size-alloca
  e4776a5... revealer: Explain CSS oddities

Commits added to the branch:

  b7a283e... box: Ignore baselines when vertical
  c2fbb88... centerbox: Add some missing return value annotations
  01fbd04... fix a few documentation problems
  81fed62... notebook: Allocate unmapped tabs
  66a05e5... widget: Move get_resize_needed to gtkwidget.c
  5a36bc9... testpopover: Remove expand GtkBox child properties
  2568c1c... Fix a few documentation issues
  03e518c... widget: Draw css box after pushing a opacity node
  69ac440... popover: Add a contents node
  1f62cb4... widget: Remove gtk_cairo_transform_to_window
  1f63130... window: Fix annotations in get_size and get_position
  3092f2f... gtkapplication: g_dbus_proxy_new_sync can return NULL
  f0a789e... window: Fix resizing with solid-csd
  49b8250... widget: Fix a widget/container mixup
  5895fa9... widget: Fix priv dereference in size_allocate_with_baseline
  f7e3ff6... widget: Don't propagate size-allocate if only the position 
  fd117d8... widget: Add baseline and out_clip parameters to size-alloca
  86071ce... revealer: Explain CSS oddities