[gtk] (8 commits) ...Merge branch 'matthiasc/for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  14cbd13... gtk-demo: Use typographic style classes (*)
  d2d7a4b... gtk-demo: Tweak window titles (*)
  64ad490... gtk-demo: Tweak tagged entry styling (*)
  14b65a3... gtk-demo: Polish the search bar demo (*)
  4e745f0... gtk-demo: Polish all entry demos (*)
  8a13909... fixup: window titles (*)
  fb028f0... gtk-demo: Renovate the paned demo (*)
  ace83a9... Merge branch 'matthiasc/for-master' into 'master'

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