dockyard/ember-cli-async-button — pull request #2 by tekay (2014-07-08 04:00:41+00:00)
Title: `actionPromiseBinding` get out of sync if the action changes

2 changes to fix `actionPromiseBinding` getting out of sync

1. run `bindActionPromise` on change to keep in sync with the `action`
1. only call `then` on the `actionPromise` if we have one