mgr/dashboard: Improve change password dialog after first login
As soon as "mgr/dashboard: Enforce change password after first login" https://github.com/ceph/ceph/pull/29529 has been merged we can improve the dialog for changing the password.
If a new user is created and he logged into the dashboard, he is asked to set a new password. The dialog seems a bit like the user as already logged in by e.g. showing the navigation although the items are not clickable. I might be improved by using a modal dialog or showing the change password view as part of the login.