Competition Edit and Competition Delete/Publish

This PR contains two changesets:
1) Modifications to competition edit to streamline the current competition edit page (in prep for cleaning up and styling it)
2) Functionality to publish competitions. Based on discussions with Christophe the publish/delete/unpublish implementation is as follows:
 When a competition is created it is unpublished. In this state it can be destructively deleted. This allows competition owners to iteratively create their competitions without needing to implement the update (yet). Once a competition has been published (which makes it available to more than the creator) it cannot be unpublished or deleted.

This will allow our collaborators trying to build and run competitions to do so with less help than previously required.