Fixed selector push value update bug.
Fixed selector push value update bug.

closes #497

jrivelli/XLForm,ziogaschr/XLForm,ifullgaz/XLForm,chrisballinger/XLForm,droidlabs/XLForm,jpmhouston/XLForm,leberwurstsaft/XLForm,tommypeps/XLForm,vtongcoder/XLForm,cbh2000/XLForm,200895045/XLForm,ReDetection/XLForm,Tobiaswk/XLForm,mattgoldspink/XLForm,ngocphu2810/XLForm,xmartlabs/XLForm,sportlabsMike/XLForm,hazytint/XLForm,noodlewerk/XLForm,iCandyLabs/XLForm,cnbin/XLForm,ziogaschr/XLForm,AlexanderMazaletskiy/XLForm,hejunbinlan/XLForm,takeshineshiro/XLForm,vmvinothkumargithub/XLForm,tarbayev/XLForm,markrickert/XLForm,KitmanLabs/XLForm,mofodox/XLForm,jordancamara/XLForm,MiMo42/XLForm,mojidabckuu/XLForm,ifullgaz/XLForm,jdgong/XLForm,fprosper/XLForm,fhchina/XLForm,ziogaschr/XLForm,wieseljonas/XLForm,cdstamper/XLForm,aikdong/XLForm,dfinzer/XLForm,xmartlabs/XLForm,qbraksa/XLForm,vmvinothkumargithub/XLForm