Clicking on 'create new version' should only create a single version
Issue description; when creating a new version, the author is able to click on the 'Create new version' button multiple times before the new submission form loads. Resulting in multiple versions of the form being created. This occurrence may be limited to instances where users are accessing the system with low bandwidth.
- Authors should be restricted to only being able to click on the 'Create new version' once, where an Editor has submitted a Decision of 'Revise'.
- UI indication of loading in progress.