UX changes to dashboards

<img width="1308" alt="image" src="https://user-images.githubusercontent.com/377065/154133252-e10d0f9b-7572-4648-9006-5f5e5d0841c8.png">

1) Hide the form from the dashboard page. Maybe add a button saying "create your own dashboard"
2) Have a sentence saying that dashboards cannot be changed after they are created. 