cat editor: updates for vuetify 2

cateditor/src/components/ModelDeleteDialog.vue

@@ -1,5 +1,5 @@
 <template>
-  <v-layout row justify-center>
+  <v-row justify="center">
     <v-dialog v-model="show" max-width="250">
       <v-card>
         <DialogHeading title="Remove Model">
@@ -17,13 +17,13 @@
 
         <v-card-actions>
           <v-spacer></v-spacer>
-          <v-btn flat @click="show = false">Cancel</v-btn>
-          <v-btn color="primary" flat @click="doDelete()">OK</v-btn>
+          <v-btn text @click="show = false">Cancel</v-btn>
+          <v-btn color="primary" text @click="doDelete()">OK</v-btn>
           <v-spacer></v-spacer>
         </v-card-actions>
       </v-card>
     </v-dialog>
-  </v-layout>
+  </v-row>
 </template>
 
 <script>