Fixed some things in the rule controllers.

app/Repositories/RuleGroup/RuleGroupRepositoryInterface.php

@@ -13,6 +13,11 @@ use Illuminate\Support\Collection;
  */
 interface RuleGroupRepositoryInterface
 {
+    /**
+     * @return int
+     */
+    public function count();
+
     /**
      * @param RuleGroup $ruleGroup
      * @param RuleGroup $moveTo