Fix bugs with title, subtitle and custom view setters.
Fix bugs with title, subtitle and custom view setters.

PrideChung/SVPullToRefresh,mstratis/MSPullToRefresh,LBhub/SVPullToRefresh,Patreon/SVPullToRefresh,RAGOpoR/SVPullToRefresh,mambaru/SVPullToRefresh,victorai60/iOS-SVPullToRefresh,orikad/SVPullToRefresh,ericzhou2008/SVPullToRefresh,yaoxiaoyong/SVPullToRefresh,hyperoslo/SVPullToRefresh,Insfgg99x/SVPullToRefresh,gabro/SVPullToRefresh,lijie121210/SVPullToRefresh,rohan1989/SVPullToRefresh,fredformout/SVPullToRefresh,qkjs/SVPullToRefresh,vancysheva/SVPullToRefresh,PodRepo/SVPullToRefresh,inFullMobile/SVPullToRefresh,muyexi/SVPullToRefresh,0xced/SVPullToRefresh,cnbin/SVPullToRefresh,hoanganh6491/SVPullToRefresh,KatherineY/SVPullToRefresh,yagainc/SVPullToRefresh,zhouwude/SVPullToRefresh,csutanyu/SVPullToRefresh,hazytint/SVPullToRefresh,weiqiangqi/SVPullToRefresh,JixinZhang/SVPullToRefresh,samvermette/SVPullToRefresh,1yvT0s/SVPullToRefresh,urmyfaith/SVPullToRefresh,viki-org/SVPullToRefresh,rtsbtx/SVPullToRefresh,siliconprime-chinh/SVPullToRefresh,imjerrybao/SVPullToRefresh,mohsinalimat/SVPullToRefresh,vstrecher/SVPullToRefresh,evanrobertson/SVPullToRefresh,ipodishima/SVPullToRefresh,lannik/SVPullToRefresh,appone/SVPullToRefresh,QuanGe/SVPullToRefresh,kudocc/SVPullToRefresh,ideaismobile/SVPullToRefresh,zeffon/SVPullToRefresh,hilen/SVPullToRefresh,EuanChan/SVPullToRefresh,vdemay/SVPullToRefresh,ronghaopger/SVPullToRefresh