The admin interface for the user to manage domains, connectors(services) and things that have things in common with this. Also you can test services here. If you select a service you can delete it with the corresponding button.
Global variables are needed to access domain-services and other helper-objects. To manage this variables there is a button in the testclient which brings you to a own site where you can manage this variables. Here you can add, edit and delete them. If some error occeur while managing the variables(deleting a variable that is already in a rule, ...), the site tells you what did go wrong.
Imports are important so that global variables can work. If the class of the global variable isn't imported an error occeurs because the neccessary classes can't be loaded. To manage this imports there is a button in the testclient which brings you to a own site where you can manage this imports. Here you can add, edit and delete them. If some error occur while managing the imports, the site tells you what did go wrong.