improve quality of qr code

Users complaining they couldn't read the qr code, tested with different variations, this seems to work

screen/receive/details.js

@@ -95,6 +95,7 @@ export default class ReceiveDetails extends Component {
                 logoSize={90}
                 color={BlueApp.settings.foregroundColor}
                 logoBackgroundColor={BlueApp.settings.brandingColor}
+                ecl={'H'}
               />
             )}
           </View>