Under Community Review

Make creating a new version easier for the author of a topic.

Creating a new version is far more common than creating a new branch.  If I am the author of a given released topic, make "Create a new version" happen when I try to check it out without asking for confirmation or asking if I want to create a new branch.  Ask for confirmation only if I am not the author.  Make "Create a new branch" a separate operation because it is uncommon.