Update QSelect.vue (#1153)
Update QSelect.vue (#1153)

Fix show and hide method
quasarframework/quasar,quasarframework/quasar,pdanpdan/quasar,rstoenescu/quasar-framework,pdanpdan/quasar,fsgiudice/quasar,quasarframework/quasar,quasarframework/quasar,rstoenescu/quasar-framework,pdanpdan/quasar,rstoenescu/quasar-framework,fsgiudice/quasar,pdanpdan/quasar,fsgiudice/quasar