add page to show mnemonic seed phrase for backup

src/views/ContactAmountsView.vue

@@ -110,6 +110,7 @@
       </div>
     </div>
 
+    <!-- This same popup code is in many files. -->
     <div v-bind:class="computedAlertClassNames()">
       <button
         class="close-button bg-slate-200 w-8 leading-loose rounded-full absolute top-2 right-2"
@@ -130,7 +131,6 @@ import { Options, Vue } from "vue-class-component";
 import { accountsDB, db } from "@/db";
 import { Contact } from "@/db/tables/contacts";
 import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
-import { AppString } from "@/constants/app";
 import { accessToken, SimpleSigner } from "@/libs/crypto";
 import {
   AgreeVerifiableCredential,
@@ -321,16 +321,15 @@ export default class ContactsView extends Vue {
     this.isAlertVisible = true;
   }
 
+  // This same popup code is in many files.
   alertTitle = "";
   alertMessage = "";
   isAlertVisible = false;
-
   public onClickClose() {
     this.isAlertVisible = false;
     this.alertTitle = "";
     this.alertMessage = "";
   }
-
   public computedAlertClassNames() {
     return {
       hidden: !this.isAlertVisible,