In previous versions of TeamCity artifact-based tabs can only be configured by editing configuration files manually. Now there is convenient UI for these tasks.
Custom report tabs configuration UI for builds:
Custom report tabs configuration UI for project page (available at the bottom of the edit project settings page):
You can now easily archive no longer active projects. Archived projects will be shown on the separate tab in the Administration area, their build configurations will be paused and changes collecting for their VCS roots will be stopped (if VCS roots are not shared with active projects). Builds however can be triggered manually, and project/build configuration settings can be edited.