[gtk] (19 commits) ...Merge branch 'wip/baedert/for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  df08387... csscalcvalue: Avoid allocating memory in compute() (*)
  b25f93e... Make dimension values and calc values just number values (*)
  24608d5... gtkarray: Fix a typo (*)
  75cfe3c... gtkarray: Create GPtrArray in insert() if we have to (*)
  f38bbb9... gtkarray: memcpy() directly into the GPtrArray (*)
  e12c9de... csstransiton: Save finished state (*)
  06460ea... css: Drop a few dynamic type checks (*)
  57444f7... testtreeview: Properly annotate a switch fallthrough (*)
  1b10020... css: Make GtkStyleAnimation and subclasses non-objects (*)
  343707e... stylecontext: Remove some unused private API (*)
  2455978... widget: Move {dis,}connect_frame_clock into their only call (*)
  cbbbf44... cellrenderertoggle: Replace save_named with a css node (*)
  bcdd6d5... printunixdialog: Use two "paper" css nodes (*)
  6566fdc... scrolledwindwo: Add a permanent junction node (*)
  343d294... stylecontext: Remove _save_named (*)
  d015b1b... scrolledwindow: Always keep the main child first (*)
  b98ad54... gl renderer: Only destroy shader programs with ids > 0 (*)
  52ae384... gl shaders: unify frag coord handling (*)
  3299942... Merge branch 'wip/baedert/for-master' into 'master'

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