cleanup glyph3dmapper and improve

The polydata rendering code has been cleaned up a fair amount
which allows us to cleanup this class and make it use the
fast path for all primitive types.  At this point only
selection should be using the medium path and the slow
path has been completely removed.

This change also fixes an issue where the glyph mapper did
not honor the edge visibility flag. This change includes
a new test to verify that edge vilibility is working as
well.