fix filtering mode in prefilter utility
fix filtering mode in prefilter utility

SuperStarPL/engine,horryq/engine-1,guycalledfrank/engine,maxwellalive/engine,maxwellalive/engine,SuperStarPL/engine,MicroWorldwide/PlayCanvas,horryq/engine-1,aidinabedi/playcanvas-engine,sereepap2029/playcanvas,guycalledfrank/engine,sanyaade-teachings/engine,nizihabi/engine,playcanvas/engine,sanyaade-teachings/engine,aidinabedi/playcanvas-engine,3DGEOM/engine,shinate/engine,SuperStarPL/engine,H1Gdev/engine,3DGEOM/engine,horryq/engine-1,RainsSoft/engine,RainsSoft/engine,H1Gdev/engine,playcanvas/engine,RainsSoft/engine,shinate/engine,3DGEOM/engine,nizihabi/engine,sanyaade-teachings/engine,nizihabi/engine,sereepap2029/playcanvas,maxwellalive/engine,shinate/engine,MicroWorldwide/PlayCanvas,sereepap2029/playcanvas