fix(QTable): duplicate headerClasses added #8205
fix(QTable): duplicate headerClasses added #8205

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