Need to prompt for document type earlier

[cmbirk]

I'm seeing that the document type can be set after initially creating the document, but that's going to cause quite a few problems both on the user side and our implementation side. Just one on the implementation side is being able to address the context blocks when the document is created or the type is changed.

This really should be a selection on the previous screen. Just spitballing some options here are:

1. The user clicks Create new document and is then prompted for the document type.
2. There are tabs. One for Create New Document that have buttons for each document type and one for Create From Template that have buttons for each saved template ( also indicating which document type the template is )

We then can load the document into etherpad and only set the type / context options one time on document creation.