Move actions into context menu, add support for deleting a backup

app/Http/Requests/Api/Client/Servers/Backups/DeleteBackupRequest.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Pterodactyl\Http\Requests\Api\Client\Servers\Backups;
+
+use Pterodactyl\Models\Permission;
+use Pterodactyl\Http\Requests\Api\Client\ClientApiRequest;
+
+class DeleteBackupRequest extends ClientApiRequest
+{
+    /**
+     * @return string
+     */
+    public function permission()
+    {
+        return Permission::ACTION_BACKUP_DELETE;
+    }
+}