Log Message:
mate-themes: update 3.22.18:

.18.18.1.18.18.18.18.18.18.18.18.18.18.18.18.18.18.18.18.18.18.18.18.18.188
C.18.18.18VS: \ 
---------------------------------------------------------------------ync with \ 
transifex
    Menta/Submarine: fix backdrop/focus state with gnome-disk-utility
    submarine: reduce button radius
    submarine: fix headerbar backdrop state button jumping
    some themes: drop styling for eom sidebar buttons
    submarine: give emoji-picker popup a nicer look
    submarine: few fixes for buttons in titlebar and popovers
    submarine: fix font color in lightdm-settings
    highcontrast: Use normal titlebar size for utility windows
    all themes: add a thiny border to the panel
    submarine: fix borders in filechooser placessidebar

### 3.22.17 (GTK 3.22)

  * sync with transifex
  * submarine: drop double border of scrollbar sliders
  * Submarine: some border fixes for caja notebook
  * all themes: xrandr-applet menu styling
  * Submarine/GreenLaguna: fix bg of foo-scroll-area
  * Menta themes: fix background size for windows-control icons
  * all themes: Mate Panel: Fix align with CheckBoxes in applet popup menu
  * Menta themes: use icons with best resolution
  * HighContrast: use HC icon-theme
  * Fix more HighContrast themes visibility with metacity
  * HighContrast: Rework colors
  * TOK: "menu > menuitem" instead "menu menuitem"
  * Update default cursor size
  * TOK/TG: Fix: checkboxes and radio buttons are little and blurry
  * Fix HighContrast themes visibility with metacity
  * use HighContrastInverse theme from gtk+