In Rim2dIntersectionViewCollection::syncFromExistingIntersections the
branch reusing an existing view dereferenced the RimGridView ancestor
without a null check, while the branch creating a new view already
guarded it with "if ( view )".
Intersections created without a RimGridView ancestor (for example via
the gRPC/Python API on a detached intersection collection) have a null
ancestor, causing a crash on the cellVisibilityChanged disconnect/connect
calls. Guard these calls with the same null check used in the new-view
branch and always push the existing view back into the collection.
* Refactor interface to PdmObjectHandle and PdmFieldHandle
Return objects instead of passing in structures as parameters
* Add nodiscard to several functions
* Remove redundant this->
* Rename to ptrReferencedObjectsByType