While some performance hit from the extra flushes was expected and would be
acceptable, the performance hit can be over 50% on some configurations, which
clearly isn't acceptable. This patch introduces a "StrictDrawOrdering"
registry key for applications affected by this, until we have a more
structural solution.

This is safe because the reference count is stored in 2 bytes on disk.

This is safe because the reference count is stored in 2 bytes on disk.