[gtk] (23 commits) Non-fast-forward update to branch wip/baedert/single-node-window

[Timm Bäder <baedert src gnome org>]

The branch 'wip/baedert/single-node-window' 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:

  18286d6... window: Create constraint solver on demand
  c446e48... widget: Remove GtkWindow special case in create_render_node
  1bf2d44... widget: Make 1 if out of 2 ifs
  1701bf5... window: Remove custom snapshot() implementation
  06dad8f... window: Don't care about shadow in size_allocate()
  229409f... window: Don't care about shadow in measure()
  a0e9629... window: Remove decoration node
  3afc2bc... main: Inline propagate_{down,up} in propagate_internal()
  9d9ce5c... window: Fix titled -> tiled typo
  1ee7cdf... /o\
  8cd4ce5... window: ref() window before removing from toplevel list

Commits added to the branch:

  aedc956... renderboder: Ignore transparent outlines (*)
  ef2af52... widget: Remove size allocate signal enum member (*)
  167c611... widget: Move adjusted size calculation below early-out goto (*)
  949eb8d... node-editor: Monitor file and reload on changes (*)
  b9ed957... gl renderer: Fix nested rounded clip rendering (*)
  f78c167... cssvalue: Add class check to transition (*)
  9e0bf35... paned: Fix up the docs once more (*)
  fcbc972... print-editor: Fix crash (*)
  fede7cd... gtk-demo: Fix expander demo (*)
  a02c588... gtk-demo: InfoBar is not a GtkBox anymore (*)
  8a7fb4b... widget: Make 1 if out of 2 ifs (*)
  ddaf50d... window: Create constraint solver on demand (*)
  a50bf27... main: Inline propagate_{down,up} in propagate_internal() (*)
  9149c79... window: Restructure gtk_window_destroy() (*)
  8dfdd68... Merge branch 'print-editor-new-crash' into 'master' (*)
  10813dd... Merge branch 'gtk-demo-expander-fix' into 'master' (*)
  ab148c0... Merge branch 'wip/baedert/for-master' into 'master' (*)
  0015983... widget: Remove GtkWindow special case in create_render_node
  af2653d... window: Remove custom snapshot() implementation
  36ecfd7... window: Don't care about shadow in size_allocate()
  7c50a8d... window: Don't care about shadow in measure()
  5f32150... window: Remove decoration node
  5ca55d6... /o\

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