updated transition when new elements are added

The add button on the lists from the dashboard are hidden and transition back if the form is canceled.

![screen shot 2014-11-03 at 9 05 17 am](https://cloud.githubusercontent.com/assets/923211/4884348/ebd0fb70-636a-11e4-8b77-d8ac5c40d810.png)

this is a pretty slow transition... More than twice as long as the slide transition. Is that intentional? May be good to get @grindpattern and @ParkerFleming to see this in action.