Dashboard doesn't contain the "Customize dashboard" link
To see the Customize dashboard link, the logged in user needs the Admin blocks permission, as said in admin/people/permissions.


  Customizing the dashboard requires the Administer blocks permission.


This is how I see it when logged in as user #1, who has all the permissions.


  


This is how I see it with an account without that permission.


  


If then I give the Administer blocks permission to that account, this is how the dashboard appears.