If type is removed and then readded to a module, it will not have any prototypes

If an existing generated type is removed and then the same type is readded, the type will no longer have any prototypes.

See example outputs when adding, removing, and re-adding the same material from content library view:

First add of material to the project, output from MaterialBrowserView::nodeReparented() listing allExportedTypeNames() for all selfAndPrototypes() of the reparented node of the added type:

node= "Generated.Bundles.Materials.StoneMaterial"
prototype= "StoneMaterial"
prototype= "StoneMaterial"
prototype= "PrincipledMaterial"
prototype= "PrincipledMaterial"
prototype= "PrincipledMaterial"
prototype= "PrincipledMaterial"
prototype= "PrincipledMaterial"
prototype= "QQuick3DPrincipledMaterial"
prototype= "Material"
prototype= "QQuick3DMaterial"
prototype= "Object3D"
prototype= "QQuick3DObject"
prototype= "QtObject"
prototype= "QObject"

After removal and re-adding of the same material, the list of prototypes is much shorter, containing only the self types:

node= "Generated.Bundles.Materials.StoneMaterial"
prototype= "StoneMaterial"
prototype= "StoneMaterial"

This breaks all isBasedOn checks for the node.