title: Component had no action handler for... Behaviour changes between ember 2.8.0 and 2.8.1
body: <p>Please see this <a href="https://ember-twiddle.com/00c110c26ca37a29019124f7ad46001d" rel="nofollow">ember-twiddle</a>. </p>
  
  <p>What I want is to provide custom buttons with custom actions to a component. The component itself does not know about the actions involved, these actions are expected to bubble to the corresponding controller. </p>
  
  <p>This code works in ember 2.8.0 but not in the current release version (2.8.2). Please use the twiddle to change between emberjs "2.8.0" and "release". Is this an emberjs bug?</p>