[gtk] (29 commits) Non-fast-forward update to branch wip/otte/guadec2018

[Benjamin Otte <otte src gnome org>]

The branch 'wip/otte/guadec2018' 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:

  7794df5... mediafile: Check if media files are open when trying to pla
  9e71541... gtk: Add GtkZoom
  5192a60... css: Report sizes as absolute
  89965e2... css: Don't do indirections
  ee41a79... mediafile: Export gtk_media_file_get_impl_type()
  67019ab... demos: Add GTK4 lightning talks talk

Commits added to the branch:

  0abd01e... ModelButton: Add 'use-markup' property (*)
  dfd1372... wayland: Update cursor surface scale when output scale chan (*)
  d9dcfff... Merge branch 'wip/aplazas/modelbutton-markup-master' into ' (*)
  9c3de51... Merge branch 'wip/cursor-output-scale-changes' into 'master (*)
  ca94ff1... testsuite/gtk/defaultvalue: Actually build...& fix (*)
  fd69f1c... eventcontrollerkey: Document key-pressed and key-released (*)
  7733f64... gdk: Rename GdkDragContext to GdkDrag (*)
  fb98f93... docs: Update dnd section (*)
  64f5afe... dnd: Rename headers (*)
  af93646... Merge branch 'event-controller-key-docs' into 'master' (*)
  ae3163b... ScrolledWindow: Add missing apostrophes (*)
  51b77a4... ScrolledWindow: Fix/improve doc of key bindings (*)
  51981d5... ScrolledWindow: a couple of spelling/grammar fixes (*)
  c8e082f... win32: Adapt to dnd api changes (*)
  c892d27... Adwaita: Regenerate CSS for text handle overhaul (*)
  269a9d8... Adwaita: Drop some unneeded overrides (*)
  1246473... Merge branch 'dnd-cleanups' into 'master' (*)
  3137d32... docs: Add new DnD types (*)
  7d842cb... Update POTFILES.in (*)
  19afe45... Merge branch 'gdk4-dnd-docs' into 'master' (*)
  55a1f8c... HC: merge dupe selectors; linebreaks for legibility (*)
  1462042... themes: Restore default progressbar min sizes (*)
  e1b6496... image: size request is always CONSTANT_SIZE (*)
  fba0b35... css: Report sizes as absolute (*)
  3ca59b8... css: Don't do indirections (*)
  e665667... mediafile: Check if media files are open when trying to pla (*)
  0ce5bde... gtk: Add GtkZoom
  15b2f35... mediafile: Export gtk_media_file_get_impl_type()
  a56a0e2... demos: Add GTK4 lightning talks talk

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