Comment 7 for bug 311513

Here is a try : http://bazaar.zigarn.com:8080/. It use the repository layout given in my comment

The default mode is directory.
If a branch have no sub-branch, the view is switched to changes of this branch.
To open a branch, the only way is to use the link on branch-folder icon.
There is now a '.' entry in directory view to open the current branch.