rename HelloWorld to CatalogEditor

cateditor/src/App.vue

@@ -3,7 +3,7 @@
     <Navbar/>
 
     <v-content>
-      <HelloWorld/>
+      <CatalogEditor/>
     </v-content>
 
   </v-app>
@@ -11,13 +11,13 @@
 
 <script>
 import Navbar from './components/Navbar'
-import HelloWorld from './components/HelloWorld'
+import CatalogEditor from './components/CatalogEditor'
 
 export default {
     name: 'App',
     components: {
         Navbar,
-      HelloWorld
+        CatalogEditor
     },
     data () {
         return {