3 issues with the Draft Tray layer list:
- The layer list should display even if there are no layers so that the "Add new Layer" option can be selected.
- "Project" and "BuildingPart" objects should be added to the list (depending on "AutogroupAddGroups" of course).
- The "LayerContainer" object should not be added to the list. Although it is in fact a group, it is just too confusing.