Fix set didRegisterInternalRedrawObservers to false after removing observers
Fix set didRegisterInternalRedrawObservers to false after removing observers

medhelpintl/SVGKit-MH,JohnWong/SVGKit,JohnWong/SVGKit,VividSeats/SVGKit,medhelpintl/SVGKit-MH,VividSeats/SVGKit,JohnWong/SVGKit,VividSeats/SVGKit,JohnWong/SVGKit,VividSeats/SVGKit,medhelpintl/SVGKit-MH,medhelpintl/SVGKit-MH