[gtk] (4 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:

  2a6a0d7... gtk-demo: Improve the entry completion demo
  2b09acd... gtk-demo: Enable inline completion
  9a911a8... entrycompletion: Various fixes

Commits added to the branch:

  fd5f6ef... gtk-demo: Improve the entry completion demo
  3656994... gtk-demo: Enable inline completion
  bce518b... entrycompletion: Various fixes
  e834e51... Install gtkstringlist.h