Changed border "Lines" drawing to use OpenGL line strip since it is faster...

Changed border "Lines" drawing to use OpenGL line strip since it is faster than the new "Polyline" drawing and added a new border drawing type "Polylines" that uses the new Polyline drawing.  While the OpenGL line drawing is faster, the line width is limited by OpenGL the quality of the lines may be lower (no joins where line segments meet).  The polyline drawning is slower but it is of higher quality (joins ends of line segments) and is not limited in width.