Implement SystemLifecycleComponent instead of making the
ActionManager create one and forget about it...

This is causing weird shit™ to happen when plugins create new
AutoCommands - without running inside a doPrivileged block,
the manager hits a security exception trying to subscribe
it to the eventbus (which uses reflection).

Need to implement this properly and then re-enable.

Not sure why they're still in two places...

Drop the /notify command, as manually setting it doesn't make
sense in a post-actions world.

Drop the action component because they're now useless.

Should probably improve this to only raise an event when the
values change, but will do for now.

Not 100% sure this is a good idea though.

Needs to allow configuring of the colours, and provide events
for notifying the UI.

  - Also by AutoValue Topic
  - Also make getUser in Topic Optional

Fix the channel message sink actually doing common channels...
I guess we're not really using that one.