Add ScreenSpaceRenderableRenderable class (#3575)

src/properties/propertyowner.cpp

@@ -302,7 +302,8 @@ void PropertyOwner::addPropertySubOwner(openspace::properties::PropertyOwner* ow
         const bool hasProp = hasProperty(owner->identifier());
         if (hasProp) {
             LERROR(std::format(
-                "PropertyOwner '{}'s name already names a Property", owner->identifier()
+                "PropertyOwner '{}'s identifier is already in use for a Property",
+                owner->identifier()
             ));
             return;
         }

src/scene/scenegraphnode.cpp

@@ -924,7 +924,7 @@ void SceneGraphNode::renderDebugSphere(const Camera& camera, double size,
 void SceneGraphNode::setParent(SceneGraphNode& parent) {
     ghoul_assert(_parent != nullptr, "Node must be attached to a parent");
 
-    parent.attachChild(_parent->detachChild(*this));
+    _parent = &parent;
 }
 
 void SceneGraphNode::attachChild(ghoul::mm_unique_ptr<SceneGraphNode> child) {