As a user, I want to add a WMS layer hierarchy, so that the layer and it's sublayers become part of the MapContextLayer hierarchy.
Acceptance criteria
[ ] Given I am a user and I am editing a MapContext, when I add the root layer of the DWD WMS, I want that the root WMS layer and it's descendants are added to the MapContext layer hierarchy.
Environment
User Story
As a user, I want to add a WMS layer hierarchy, so that the layer and it's sublayers become part of the MapContextLayer hierarchy.
Acceptance criteria