fix(QCollapsible): Move header[Style|Class] to props (#1348)
fix(QCollapsible): Move header[Style|Class] to props (#1348)


fsgiudice/quasar,quasarframework/quasar,quasarframework/quasar,rstoenescu/quasar-framework,fsgiudice/quasar,pdanpdan/quasar,rstoenescu/quasar-framework,pdanpdan/quasar,quasarframework/quasar,fsgiudice/quasar,pdanpdan/quasar,pdanpdan/quasar,quasarframework/quasar,rstoenescu/quasar-framework