close #1988: Guard el.__qbacktotop in VBackToTop (#1989)
close #1988: Guard el.__qbacktotop in VBackToTop (#1989)

close #1988
quasarframework/quasar,fsgiudice/quasar,quasarframework/quasar,quasarframework/quasar,rstoenescu/quasar-framework,rstoenescu/quasar-framework,fsgiudice/quasar,pdanpdan/quasar,pdanpdan/quasar,pdanpdan/quasar,rstoenescu/quasar-framework,pdanpdan/quasar,fsgiudice/quasar,quasarframework/quasar