Rename a few QuadShader bits to better match IndexedTrisShader
Rename a few QuadShader bits to better match IndexedTrisShader

My brain is getting increasingly angry every time I bounce between
the two files things are ALMOST the same but not quite.

rachelharvey/playn,playn/playn,ruslansennov/playn2,ruslansennov/playn2,rachelharvey/playn,tinkerstudent/playn,thecocce/playn-1,playn/playn,longtaoge/playn,longtaoge/playn,playn/playn,thecocce/playn-1,tinkerstudent/playn