Reference Property Descriptors need refactoring for natural TrailsPagesService operation
When using AssignedIds if a new object repeats an already existing pk, the new object overwrites the old one.
Persistence Service incomplete, lacks coherent OneToOne support
Contribute builders to BuilderDirector
ObjectTable should offer standard select-all column with delete/new buttons at base/top
Collection Editor should offer standard select-all column with select-all/unselect-all buttons at base