fix(selection_slot): added flex
fix(selection_slot): added flex

size was broken on smaller screens

Phlow2001/vuetify,vuetifyjs/vuetify,Webifi/vuetify,vuetifyjs/vuetify,vuetifyjs/vuetify,Webifi/vuetify,Phlow2001/vuetify,vuetifyjs/vuetify,Webifi/vuetify,Phlow2001/vuetify,Phlow2001/vuetify