#2 Allow multiple update service to be added and configured

[Derek Wichmann]

A feature that allows more than one update service to be
udpated to would be quite useful.

We could have a list of UpdateServices that are saved to
the persistence store and then allow them to be added,
removed, modified from the UI. Some sort of little shutte
widget where you enter a service name, type and click
add that sends it into some sort of scrollable list where
you can select each update service that's in there and
then edit it or delete it. Of course this further
complicates the UI since it can have n types of update
services, and then x numbers of each type.

During runtime the Runtime class would get the list of
update services from the persistence store and then
make an update to each one.

Cool.