Rework the DSE Target Pattern service
Current status
In the DSE perspective, there exists a Service for adding DSE ExplorationTarget patterns. Currently, it is unused and only used for “external” patterns, corrupting the generic nature of the control code.
Proposed change
For a cleaner design, also use this service for the “internal”
patterns.
Furthermore, rework the service completely as it appears to be
overloaded and not aligned with kernel services (KISS)
(from redmine: issue id 3653, created on 2019-02-27, closed on 2020-01-24)