[gtk] (10 commits) Non-fast-forward update to branch prop-list

[Matthias Clasen <matthiasc src gnome org>]

The branch 'prop-list' 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:

  14e24b9... Add GtkSorter
  ff33b65... sorter: Add tests
  a193c41... Redo sort list model with GtkSorter
  0a56dd4... column view: Add some helpers
  f5ba195... Add GtkColumnViewSorter
  c97e561... column view: add sort model and sorter properties
  74fd189... column view column: Add a sorter property
  28feba6... column view title: Show sort indicators
  7ce6be7... column view: Add a sort-by api
  8bc2e00... inspector: Use a column view for the property list

Commits added to the branch:

  bfe2081... Add GtkSorter
  75b850f... sorter: Add tests
  9bcbd4a... Redo sort list model with GtkSorter
  5d66380... column view: Add some helpers
  a2405b0... Add GtkColumnViewSorter
  db49971... column view: add sort model and sorter properties
  695353b... column view column: Add a sorter property
  102c7d1... column view title: Show sort indicators
  eda0913... column view: Add a sort-by api
  118789d... inspector: Use a column view for the property list