enhancement for #242, fixed bug with isDirty logic
enhancement for #242, fixed bug with isDirty logic

vuetifyjs/vuetify,Webifi/vuetify,schmidigital/vuetify,vuetifyjs/vuetify,KaelWD/vuetify,vuetifyjs/vuetify,Phlow2001/vuetify,Phlow2001/vuetify,KaelWD/vuetify,azaars/vuetify,vuetifyjs/vuetify,Webifi/vuetify,stephane/vuetify,Webifi/vuetify,stephane/vuetify,Phlow2001/vuetify,azaars/vuetify,Phlow2001/vuetify,schmidigital/vuetify,stephane/vuetify,KaelWD/vuetify