[gtk] (7 commits) ...Merge branch 'matthiasc/for-master' into 'master'

[Matthias Clasen <matthiasc src gnome org>]

Summary of changes:

  7489959... gtk-demo: Add a missing source file (*)
  0fb83d7... gtk4-demo: Cosmetic fixes to the dialog demo (*)
  6141c13... gtk-demo: Fix the tagged entry demo (*)
  b46bfca... gtk-demo: Cosmetic changes to the tagged entry demo (*)
  a994392... gtk-demo: Cosmetic changes (*)
  cd10785... gtk-demo: Fix the settings demo (*)
  2a51d4f... Merge branch 'matthiasc/for-master' into 'master'

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