Update classes before onTransitionStart callback
Update classes before onTransitionStart callback

Fixes #1211

shimnex/Swiper,misterruan/Swiper,pemiu01/Swiper,pemiu01/Swiper,levi0913/swiper-conten-too-heigh,yfenng/Swiper,xxammuxx/Swiper,yukisan/Swiper,gfaceless/Swiper,nickzhuyb/Swiper,assgod/Swiper,nickzhuyb/Swiper,webcoding/Swiper,asimkt/Swiper,timkindberg/Swiper,archiveds/Swiper,wjkang/Swiper,FrankSunnyvale/Swiper,didiwuliu/Swiper,yukisan/Swiper,M-Nemo/Swiper,cemoulto/Swiper,121595113/Swiper,loki315zx/Swiper,Heqingsong/Swiper,shimnex/Swiper,didiwuliu/Swiper,cojaco/Swiper,heicx/Swiper,duocdo/Swiper,liurq/Swiper,xxammuxx/Swiper,huzion/Swiper,fun3c/Swiper,Nikeshsuwal/Swiper,huzion/Swiper,RasmusTG/Swiper,jCaptain/Swiper,cojaco/Swiper,valeri879/Swiper,drawcard/Swiper,hbiao68/Swiper,FrankSunnyvale/Swiper,wjkang/Swiper,ermakovmaxim/Swiper,ixkaito/Swiper,pedroha/Swiper,erhanaydin/Swiper,archiveds/Swiper,ermakovmaxim/Swiper,liurq/Swiper,haolee1990/Swiper,yfenng/Swiper,baiyanghese/Swiper,ccamporeale/Swiper,misterruan/Swiper,xuxiao/Swiper,pedroha/Swiper,baiyanghese/Swiper,webcoding/Swiper,121595113/Swiper,xuxiao/Swiper,compareasiagroup/Swiper,Sprokets/Swiper,Lyfme/Swiper,heriwahyudianto/Swiper,FionaWong/Swiper,pingjiang/Swiper,M-Nemo/Swiper,ruisi/Swiper,ruisi/Swiper,bcinarli/Swiper,antoniodesouza/Swiper,ixkaito/Swiper,Heqingsong/Swiper,0359xiaodong/Swiper,ao-dexter/Swiper,levi0913/swiper-conten-too-heigh,marcomatteocci/Swiper,jCaptain/Swiper,erhanaydin/Swiper,s0nly/Swiper,timkindberg/Swiper,BenWen0769/Swiper,antoniodesouza/Swiper,tvad911/Swiper,ekinwei/Swiper,tvad911/Swiper,BenWen0769/Swiper,marcomatteocci/Swiper,fun3c/Swiper,loki315zx/Swiper,asimkt/Swiper,heicx/Swiper,gdseller/Swiper,pingjiang/Swiper,ekinwei/Swiper,ao-dexter/Swiper,gfaceless/Swiper,bcinarli/Swiper,haolee1990/Swiper,FionaWong/Swiper,oepbapp/Swiper,nolimits4web/Swiper,valeri879/Swiper,oepbapp/Swiper,cemoulto/Swiper,AndreyGrin/Swiper,Nikeshsuwal/Swiper,s0nly/Swiper,0359xiaodong/Swiper,drawcard/Swiper,hbiao68/Swiper,nolimits4web/Swiper,Lyfme/Swiper,RasmusTG/Swiper,Sprokets/Swiper,compareasiagroup/Swiper,AndreyGrin/Swiper,heriwahyudianto/Swiper,ccamporeale/Swiper,gdseller/Swiper,assgod/Swiper,duocdo/Swiper