title: Toast notification response in background task
body: <p>I'm writing an application which can show toast notifications in a background task  <em>(I use BackgroundTaskBuilder)</em>. In the notification I'm using two button, which should do two different function, but I can't get the notification's response.</p>
  
  <p>I read on the internet that I should start another background task for this, but I can't start another background task in a backround task.</p>
  
  <p>So my question is: How can I get that the user what button clicked in the notification?</p>
  
  <p>Thanks for the help.</p>