Fixes missing supportedPushLocales in #811 (#812)

* Fixes missing supportedPushLocales in #811

* Added console warning if push localization is missing, with information on how to correct it.

Author: montymxb

src/lib/ParseApp.js

@@ -60,7 +60,11 @@ export default class ParseApp {
     this.serverURL = serverURL;
     this.serverInfo = serverInfo;
     this.icon = iconName;
-    this.supportedPushLocales = supportedPushLocales;
+    this.supportedPushLocales = supportedPushLocales ? supportedPushLocales : [];
+
+    if(!supportedPushLocales) {
+      console.warn(`Missing push locales for '` + appName + `', see this link for details on setting localizations up. https://github.com/parse-community/parse-dashboard#configuring-localized-push-notifications`);
+    }
 
     this.settings = {
       fields: {},