We've redesinged users and projects administration pages.
Users page now clearly separates groups displaying them in the sidebar, along with edit group and delete group actions. The list of users is divided by user groups. Checkboxes to the left of user's name serve as user selectors, and Change Group action can be applied to multiple users.
Add Users action is used to quickly add multiple users by email addresses:
E-mail addresses are accepted as-is or in form of quoted name followed by email address in angle brackets. From the screenshot above, two users will be added: one, with the name of BUGtrack Support, login support, and another one, with the name and login of sales. Password are generated randomly, other properties are taken from license's defaults.
Back to user's list, clicking on projects icon displays the list of projects user has granted the access:
The administrator may either edit user's role in a project by clicking edit icon, or check multiple projects and click edit button on the top of the list. Clicking Remove icon/button will deny the access to selected projects. To grant user's the access to the project he/she does not have access to click on Add Projects button.
Select the projects, click on Add Projects button, select the user's role and save. You'll be redirected back to user's project page.
Project administration page is designed in a similar manner.