Log Message:
mate-themes: update to 3.22.19

### 3.22.19 (GTK 3.22)

  * Translations update
  * add Travis-CI support
  * TOK/TG: fix menubar view for LibreOffice
  * Menta metacity: synchronize frame_geometry
  * BlackMATE: fix invisible checkboxes in Firefox content when userChrome.css \ 
is used
  * Trad. and Menta themes: fix menu accelerator
  * submarine: fix font-color headerbar button.default
  * Trad. and GreenLaguna: fix lightdm-gtk panel