Closing Action with Custom Funcion and Uncaught DOMException: Node.removeChild

[ClaudioCas]

There is an issue if you use snackbar with action together with the dismis:true option.

To reproduce the problem:

1. Go to the examples page http://www.michaelmickelson.com/js-snackbar/
2. Press "Closing Action with Custom Function" 2 times
3. Press on the snackbar at the top on the "I close and act" action
4. Press ok on the message box "You've done an action and closed [...]"
5. Press on the snackbar at the bottom on the "I close and act" action
6. Press ok on the message box "You've done an action and closed [...]"
   The Snackbar does not close automatically and remains on sticky.

The console shows the error "Uncaught DOMException: Node.removeChild: The node to be removed is not a child of this node" (line 342 of js-snackbar.sj)