[gtk] (8 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:

  5e56361... inspector: Use a column view for the property list
  10dc885... Cosmetics
  081fe4c... Add GtkSorter
  f3eb733... sortlistmodel: Use a sorter internally
  6fd680d... Redo sort list model fully with GtkSorter
  1676605... column view: add sort model and sorter properties
  864c80b... column view column: Add a sorter property
  3d0374e... column view title: Add sort indicators
  ec4034b... sort list model: Make the sorter writable
  61bfafa... inspector: Make prop list sortable again

Commits added to the branch:

  a5a88d6... Cosmetics
  8ab8c7e... inspector: Use a column view for the property list
  dcabe03... Add GtkSorter
  0c734ef... Redo sort list model with GtkSorter
  ba44963... column view: add sort model and sorter properties
  04d63c8... column view column: Add a sorter property
  bfd12f6... column view title: Add sort indicators
  7fe8b58... inspector: Make prop list sortable again