[gtk] (5 commits) Non-fast-forward update to branch matthiasc/for-master

[Matthias Clasen <matthiasc src gnome org>]

The branch 'matthiasc/for-master' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  2602368... Plug a memory leak in an error case

Commits added to the branch:

  bd900fe... gtk-demo: Add a switch to headerbar demo (*)
  a1e21c1... Merge branch 'wip/sadiq/headerbar-demo' into 'master' (*)
  cd60ed4... Plug a memory leak in an error case
  25d3001... textview: Make clickable tags work again
  5d6db47... gtk-demo: Beef up the hypertext demo

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