Code review comment for lp:~robertcarr/mir/demo-shell

> l232, its sort of funny to have a comment in a demo detailing a problem we
> have with our dependency structures :) Is it worth holding this up to resolve
> it?
why is the_event_filters returning an initializer_list anyways? :) I can see what forced the 2 step initialization in l232, maybe making a few input classes construct with either std::vector /or/ std::initializer_list could break the cycle