Remove special containers

"Special containers" were empty containers with editable titles, that lurked permanently on network fronts to be used occasionally for big stories. We don't need them now that we have 24/7 production staff - who use the config tool to create containers as needed. Which means we don't need functionality for editing their metadata (title, href) in the regular tool. They also caused subtle problems for apps because they could lack titles and their ids were persistent.