Turned on sorting in lights stress test.

This is now faster - losses by sorting are smaller than gains by rendering less pixels.

examples/webgl_lights_pointlights2.html

@@ -226,7 +226,7 @@
 				renderer.gammaOutput = true;
 				renderer.physicallyBasedShading = true;
 
-				renderer.sortObjects = false;
+				renderer.sortObjects = true;
 
 				// STATS