Move arrow_head property creation upwards
Move arrow_head property creation upwards

Create the arrow_head property of the ArrowVisual a bit earlier
before the object gets frozen.

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