As a general comment, you need to be careful about disabling individual services. You may disable a service that is used by another feature that you are unaware of.
What the service manager panel really needs to do is allow the enabling/disabling of SME features rather than linux serives. For example, if you elect to disable email, then the panel should know to shutdown qmail, fetchmail, etc. The point is, some "features" rely on more than one "service". The panel code should know to check other features before blindly shutting down services. Take mysqld for example. If Mitel starts using mysql to store config settings or for another feature, then shutting down mysql because you don't use webmail would cause problems. That is why I think the service manager panel should be redesigned as a feature manager panel.