mate-themes: update to 3.22.22

Change log:

3.22.22 (GTK 3.22)

  * Translations update
  * Traditional themes: fix tooltip shadow on openindiana
  * The compositor doesn't apply the shadow mask if border-radius is 0
  * build: allow users to disable gettext support (--disable-nls)
  * i18n: icon theme ContrastHigh
  * Set gtk-print-preview-command in settings.ini
  * Remove the execution bit
  * Remove USE_MATE2_MACROS from autogen.sh (legacy)
  * Green-Submarine: Use procedural adaptive-sized icons
  * Blue-submarine: Use procedural adaptive-sized icons
  * gtk-widgets.css: Add the missing .context-menu class
  * Traditional and Menta theme families:  Resolved Caja sidebar display regressions
  * TraditionalOk/Green: Fix title_border bottom attribute

(gutteridge)