Added active toggle to webhooks

To allow easy temporary de-activation without deletion or other
workarounds. Updated tests to cover.

database/factories/Actions/WebhookFactory.php

@@ -20,6 +20,7 @@ class WebhookFactory extends Factory
         return [
             'name' => 'My webhook for ' . $this->faker->country(),
             'endpoint' => $this->faker->url,
+            'active' => true,
         ];
     }
 }