[gtk] (10 commits) ...Merge branch 'matthiasc/for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  f2edf40... node test: Improve --generate (*)
  efb5e79... nodeparser: Change the serialization (*)
  1e1f199... node-editor: Support pasting the image (*)
  e7284c2... inspector: Support copying nodes to clipboard (*)
  23dab88... text: Name all event controllers (*)
  cb18437... widget-factory: Name an event controller (*)
  a228b2d... imwayland: Name event controllers (*)
  91bcf6f... immulticontext: Unset client widget on delegate change (*)
  a8e8e04... settings: Make font-size changes apply immediately (*)
  2f1ff30... Merge branch 'matthiasc/for-master' into 'master'

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