Show print state

      <template v-slot:activator="{ on }">

        <v-card-text align="left" :v-show="show_print_state()" v-on="on">

          <v-icon color="grey">mdi-clock-time-four</v-icon>

           {{ this.print_state() }}

           {{ print_state }}

        </v-card-text>

      </template>

      <span>État de l'impression</span>