[gtk] (14 commits) ...Merge branch 'wip/carlosg/imwayland-for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  024220a... imwayland: Add text-input-unstable-v3 support (*)
  c49b29f... imwayland: clear preedit on focus out (*)
  1e69d24... modules: Check current context before retrieving surroundin (*)
  fcf28de... imwayland: Fix clearing of preedit text (*)
  c4b4e90... imwayland: Fix clearing of preedit text in webkitgtk (*)
  12ac9f3... imwayland: Don't reset serial while text-input is alive (*)
  8912dc2... imwayland: Collect return value from ::delete-surrounding s (*)
  f676278... imwayland: Handle enter and leave events (*)
  b465e04... imwayland: rearrange functions to remove prototypes (*)
  7a0b6a3... imwayland.c: fix formatting (*)
  904202a... imwayland: Plug leaks (*)
  8ce6d03... imwayland: Respect maximum length of 4000 Bytes on strings  (*)
  beb9ee6... build: wrap IM protocol building under have_wayland altoget (*)
  cd7e706... Merge branch 'wip/carlosg/imwayland-for-master' into 'maste

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