Update sorting example
Update sorting example

Enable ability to disable sorter.
Change clear colour so that we can read the fps
display.

jdreaver/vispy,inclement/vispy,sh4wn/vispy,julienr/vispy,jay3sh/vispy,jdreaver/vispy,drufat/vispy,julienr/vispy,QuLogic/vispy,drufat/vispy,hronoses/vispy,Eric89GXL/vispy,jay3sh/vispy,bollu/vispy,QuLogic/vispy,inclement/vispy,hronoses/vispy,dchilds7/Deysha-Star-Formation,srinathv/vispy,julienr/vispy,bollu/vispy,sbtlaarzc/vispy,srinathv/vispy,sh4wn/vispy,ghisvail/vispy,jay3sh/vispy,sbtlaarzc/vispy,RebeccaWPerry/vispy,michaelaye/vispy,kkuunnddaannkk/vispy,kkuunnddaannkk/vispy,ghisvail/vispy,hronoses/vispy,dchilds7/Deysha-Star-Formation,michaelaye/vispy,jdreaver/vispy,QuLogic/vispy,ghisvail/vispy,sbtlaarzc/vispy,Eric89GXL/vispy,Eric89GXL/vispy,kkuunnddaannkk/vispy,bollu/vispy,drufat/vispy,michaelaye/vispy,dchilds7/Deysha-Star-Formation,RebeccaWPerry/vispy,RebeccaWPerry/vispy,srinathv/vispy,sh4wn/vispy,inclement/vispy