Where can I view the entire list of users in a member group of E-Newsletter?

It seems very strange to me that when you click on a member group in e-Newsletter that there is no way to bring up a list of the users in that group. One must go through all the users of a site to see what groups they are attached to and even there the "Group" category is greyed out and unclickable so you can't even sort the users by group.

It would seem to me this should be a very basic functionality of e-Newsletter to be able to view group user lists and add and subtract people that way.