expand if contentSize of scrollView changes and is not sufficiently long
expand if contentSize of scrollView changes and is not sufficiently long

issue: https://github.com/telly/TLYShyNavBar/issues/53

odyth/TLYShyNavBar,liuzechen/TLYShyNavBar,eyeem/TLYShyNavBar,ajijoyo/TLYShyNavBar,eyeem/TLYShyNavBar,odyth/TLYShyNavBar,achyusuf/TLYShyNavBar,achyusuf/TLYShyNavBar,liuzechen/TLYShyNavBar,ajijoyo/TLYShyNavBar,kam800/TLYShyNavBar,Remki/TLYShyNavBar,Remki/TLYShyNavBar,evands/TLYShyNavBar,telly/TLYShyNavBar,griddle/TLYShyNavBar,gfzabarino/TLYShyNavBar,griddle/TLYShyNavBar,evands/TLYShyNavBar,kam800/TLYShyNavBar,telly/TLYShyNavBar,gfzabarino/TLYShyNavBar