xfce4-settings: update to 4.13.6

Change log:

4.13.6
======
- New Feature: Add color-settings (colord frontend)
- New Feature: Add display profile support to the daemon
- Bugfixes and other smaller changes:
  - display:
    - Track and highlight active profile
    - Ask user to update profile when closing with unsaved
      changes
    - Add interactive information about primary display setting
    - Improve profile-create popover
    - Improve profile-delete dialog
    - UI alignment improvements
    - Reduce complexity of the code and speedup
      display_settings_get_profiles
    - Replace deprecated GtkStock
    - Re-introduce display numbering
    - Ensure the settomgs dialog gets properly destroyed
    - Verify unique profile names
    - Drop connector name from profile matching
    - Correctly fall back to previous profile on cancel
    - Fix alignment of buttons in minimal dialog
    - Only show profiles which match *all* connected displays
    - Update profile list on screen changes
    - Fix crash when no RRMode is available (bug #12607)
    - Correctly hide primary setting with 1 display
    - Fix calculation of offset
    - Always show the 'primary display' option
    - Make primary indicator a star icon
    - Throw warning when monitors exceed max screen size
  - color: Always select first device on startup (Bug #15266)
  - xfsettingsd: Increase startup priority
  - Fix scrolling in embedded settings dialogs (Xfce #14285, LP #1653448)
  - Fix search change clearing and hiding sections (bug #14792)
  - Resolved g_type_class_add_private deprecations (GObject 2.58)
  - Fix incremental sending from the clipboard manager (Bug #13537)
  - Fix WindowScalingFactory property type
  - Fix code spacing
  - Fix memory leaks
  - Fix CID 337242: Null pointer dereferences (REVERSE_INULL)
  - Fix compiler warnings
  - Fix icon names
  - Update configure.ac.in
  - Update .gitignore
  - Set yes as the default debug level
- Translation Updates:
    Albanian, Arabic, Asturian, Basque, Belarusian, Bulgarian, Catalan,
    Chinese (China), Chinese (Hong Kong), Chinese (Taiwan), Croatian,
    Czech, Danish, Dutch (Flemish), English (Australia), English (Great
    Britain), Finnish, French, Galician, German, Greek, Hebrew, Hungarian,
    Icelandic, Indonesian, Italian, Japanese, Kazakh, Korean, Lithuanian,
    Malay, Norwegian Bokm奪l, Norwegian Nynorsk, Occitan, Polish,
    Portuguese, Portuguese (Brazilian), Romanian, Russian, Serbian, Slovak,
    Slovenian, Spanish, Swedish, Thai, Turkish, Ukrainian, Uyghur


(gutteridge)