DUNE/Maneuvers: Using dispatch from base class Task when dispatching Memento.
DUNE/Maneuvers: Made comment more explicit.
Maneuver/Multiplexer: Added onManeuverDeactivation() method. onManeuverActivation() cannot be implemented since multiplexer cannot know which maneuver will start.
Maneuver/Multiplexer: Handling onManeuverDeactivation().
Maneuver/Multiplexer: In class Idle, disabling memento.