guisection for -z

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@40170 15284696-431f-4ddb-bdfa-cd5b030d7da7

display/d.vect/main.c

@@ -353,6 +353,7 @@ int main(int argc, char **argv)
     zcol_flag = G_define_flag();
     zcol_flag->key = 'z';
     zcol_flag->description = _("Colorize polygons according to z height");
+    zcol_flag->guisection = _("Colors");
 
     /* Check command line */
     if (G_parser(argc, argv))