Add timer for subtasks and remove settings for subtask time tracking

app/Controller/Config.php

@@ -42,7 +42,7 @@ class Config extends Base
 
             switch ($redirect) {
                 case 'project':
-                    $values += array('subtask_restriction' => 0, 'subtask_time_tracking' => 0);
+                    $values += array('subtask_restriction' => 0);
                     break;
                 case 'integrations':
                     $values += array('integration_slack_webhook' => 0, 'integration_hipchat' => 0, 'integration_gravatar' => 0, 'integration_jabber' => 0);