Supporting copying a branch document to a branch document

1. when viewing a branched 'foo' document in the branch 'foo' for it in the CM
2. and then copy that document
3. then there is a document copy that does not contain the 'core' version but only branch 'foo'

Assume this:

    + New Doc             (branches = {foo})
         + New Doc        (branch = {foo})

As a result, the CM should have the following Toolba

1. when viewing the branch channel 'foo' the we should see

   Page 'New Doc' for project 'Foo'

2. viewing the Core should show

   Page 'New Doc': offline, not part of Core

3. hen viewing the branch channel 'bar' the we should see

   Page 'New Doc': offline, not part of project 'Bar'

The back end returns regardless whether you are looking at foo, bar or core the following, since that is the only thing the backend can do and should do:

"xpage":{
        "branchId":"foo",
        "name":"New Doc",
        "state":"new"
      }

The frontend Toolbar should be improved. Note that I think the Toolbar values should come from the backend instead of figuring it out in the frontend.