Log Message:
Update to 1.20.0:

gsm-manager.c: Fix build warning:
don’t lose focus when displaying logout or shutdown dialog
add style class logout-dialog
avoid deprecated gdk_screen_make_display_name
don’t use deprecated gtk_show_uri
avoid deprecated gdk_screen_get_number
systemd user-session needs to be updated to get all user-defined enviroment when \ 
the session starts.
dbus needs to be updated to get all user-defined environment when the session starts.
Translations update