fix arrow position for top-aligned bubbles, fix scroll issue
fix arrow position for top-aligned bubbles, fix scroll issue

sganz/hopscotch,zimmi88/hopscotch,slietz/hopscotch,thbar/hopscotch,renatolotfi/hopscotch,k10world/Hopscotch,dataquestio/hopscotch,adcade/hopscotch,stephenh/hopscotch,thbar/hopscotch,Xephi/hopscotch,linkedin/hopscotch,renatolotfi/hopscotch,Axosoft/runningjumpscotch,stephenh/hopscotch,kate2753/hopscotch,slietz/hopscotch,zimmi88/hopscotch,sganz/hopscotch,adcade/hopscotch,Axosoft/runningjumpscotch,Xephi/hopscotch,ryanone/hopscotch,kate2753/hopscotch,dataquestio/hopscotch