[gtk] (16 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:

  e6fe7aa... Add GtkSorter
  49df6d9... Add GtkMultiSorter
  8ff0aa7... sorter: Add tests
  6f76d04... Redo sort list model with GtkSorter
  c771704... column view: Add some helpers
  1a75d93... Add GtkColumnViewSorter
  1d54fde... column view: Add a sorter property
  82c86c3... column view column: Add a sorter property
  7ae4380... column view title: Show sort indicators
  3597f13... column view: Add a sort-by api
  0d42512... inspector: Use a column view for properties
  3b4b0b2... inspector: Use a column view for the resource list
  29b4942... inspector: Use a column view for actions
  2cc064f... inspector: Touch up list styling
  a45e4e8... any filter: Add a missing precondition

Commits added to the branch:

  e1ab8db... filter: Add a missing precondition
  8bf6a1a... Add GtkSorter, GtkStringSorter, GtkCustomSorter
  6448181... Add GtkMultiSorter
  64a9bb4... Add GtkNumericSorter
  bf0f792... sorter: Add tests
  920fde9... Redo sort list model with GtkSorter
  255a9e9... column view: Add some helpers
  eabb828... Add GtkColumnViewSorter
  faadf1e... column view: Add a sorter property
  a79ea50... column view column: Add a sorter property
  e31e418... column view title: Show sort indicators
  740fd1d... column view: Add a sort-by api
  f599bef... inspector: Use a column view for properties
  583a86c... inspector: Use a column view for the resource list
  dff80ec... inspector: Use a column view for actions
  3807382... inspector: Touch up list styling