[jsr-314-open] remove method for UI component tree

[Martin Marinschek]

> what about (in addition to offering a remove-method in the api)
> integrate component-tree lifecycle with JSR-299 Contexts (conversation
> scope) - e.g. automatically clean up views when leaving a multi-page
> wizzard?

Orchestra already does that by decorating the state-manager. However,
this worked only implementation specific, AFAIK. A cleanup of the API
of the state-manager and an API for accessing the view-states would
definitely be useful.

regards,

Martin