Register for push notifications and handle them by displaying a native notification. When a user clicks the notification we either navigate to the corresponding chat or if there is no main windows open a new one with a correct url.

• Check if the notifications display and navigate to a chat when clicked
• Check if the app is closed notifications show up and open up a new window when clicked
• Check if we get the notification but then close the app and the other way around, the click action still works correctly