Harden Cordova applicability checks

src/app/home/home.page.spec.ts

@@ -14,10 +14,7 @@ import * as CordovaSQLiteDriver from 'localforage-cordovasqlitedriver';
 import { HomePage } from './home.page';
 
 declare global {
-  // tslint:disable-next-line: no-empty-interface
-  interface Cordova {}
   interface Window {
-    cordova: Cordova;
     clearTimeout: (handle?: number) => void;
     setTimeout: (callback: () => any, interval: number) => any;
   }

src/app/home/home.page.ts

@@ -38,7 +38,7 @@ export class HomePage implements OnInit {
   ) {}
 
   ngOnInit() {
-    if (window.cordova) {
+    if (window.hasOwnProperty('cordova')) {
       // For now, no clipboard in-browser - API support not wide + no plugin support
       if (this.clipboard) {
         this.clipboard_available = true;
@@ -117,7 +117,7 @@ export class HomePage implements OnInit {
    * the keyboard to see the password and Copy button.
    */
   hideKeyboard() {
-    if (window.cordova) {
+    if (window.hasOwnProperty('cordova')) {
       this.keyboard.hide();
     }
   }

src/app/settings.service.ts

@@ -46,7 +46,7 @@ export class SettingsService {
     // Tell listening pages (e.g. Home) that the settings changed
     savePromise.then(() => {
       this.saveSubject.next();
-      if (window.cordova) { // No cloud settings without a device
+      if (window.hasOwnProperty('cordova')) { // No cloud settings without a device
         this.cloudSettings.save(settings, true);
       }
     });
@@ -148,7 +148,7 @@ export class SettingsService {
     this.currentPromise = this.storage.get(SettingsService.storageKey).then(settings => {
       if (settings === null) {
         return new Promise(resolve => {
-          if (!window.cordova) { // No cloud settings without a device
+          if (!window.hasOwnProperty('cordova')) { // No cloud settings without a device
             return resolve(this.loadDefaults());
           }