[gtk] (5 commits) Non-fast-forward update to branch file-filter2

[Matthias Clasen <matthiasc src gnome org>]

The branch 'file-filter2' 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:

  aeea2d3... filefilter: Drop GtkFileFilterInfo
  9f1f03f... filefilter: Convert to a GtkFilter
  191d8ef... Stop using gtk_file_filter_filter
  f444c66... Drop gtk_file_filter_filter
  60c7e7e... docs: Cleanups for the file filter docs

Commits added to the branch:

  4c2b63f... filefilter: Drop GtkFileFilterInfo
  38d0da6... filefilter: Convert to a GtkFilter
  3b079fe... Stop using gtk_file_filter_filter
  fe9e359... Drop gtk_file_filter_filter
  b49a79c... docs: Cleanups for the file filter docs