fix dropdown: calculate position according to scroll top
fix dropdown: calculate position according to scroll top

lumapps/lumX,jefvel/lumX,lumapps/lumX,hinablue/lumX,lumapps/lumX,jefvel/lumX,jefvel/lumX,jefvel/lumX,lumapps/lumX,hinablue/lumX,hinablue/lumX,hinablue/lumX