ARCHIBUS should respect clipped XREF boundaries set in CAD.

At present ARCHIBUS ignores them when publishing enterprise graphics, resulting in the entire XREF being shown. The best alternative we can offer clients with readability problems on especially large floor plans (100k+ SqFt) is to break up the source CAD file, which solves that problem but introduces other drawing management challenges. Respecting clipped XREF boundaries would make it possible to maintain a single source CAD background for large floor plans.