Limit the amount of information about users visible for domain administrators

Domain administrator has access to the /admin/users view and the displayed list of users is limited only to those users that have a role assigned in the domain currently selected in navbar.

However the table contains too many columns. Columns email, first login and last login should be removed from the view.

Note: it is required to make sure that those fields are not received from backend anymore.

In additional domain administrator should not have access to users details view. However he should be able to alter the role assigned for given users within a domain through a button displayed when clicked on the cogwheel symbol (one button for each role to which the current role can be switched).