Add loading text

Author: Alexei Vinokur

lib/cloudipsp-webview.js

@@ -44,7 +44,10 @@ export class CloudipspWebView extends React.Component {
 
   render() {
     if (this.state.baseUrl === undefined) {
-      return (<View/>);
+      return (
+        <View style={{ flex: 1 }}>
+          <Text>Loading...</Text>
+        </View>);
     } else {
       return (
         <WebView