The bugtracker entry for this issue is here:
The file is /usr/local/ispconfig/interface/web/monitor/show_sys_state.php plus the corresponding html template in the templates folder. I did a short check already and the ajax part seems to work. There were some changes in the way the list displays items from 3.0.3 to 3.0.4 and they dont seem to work properly. As the 3.0.3 implementation worked fine, my Idea was to restore the file and template from 22.214.171.124.
I am very happily working with the new features in this version - great work !!