Pass systemProperties to routeValidators

Can be null on first run -> needs a guard!

aleksis/core/frontend/mixins/menus.js

@@ -102,7 +102,7 @@ const menusMixin = {
     },
     checkValidators(validators) {
       for (const validator of validators) {
-        if (!validator(this.whoAmI)) {
+        if (!validator(this.whoAmI, this.systemProperties)) {
           return false;
         }
       }