New design of CMS plugin

Here is an image of what I have in mind:

Edit mode

1. No more separate admin interface for managing pages and menus.
2. Drag 'n' drop re-ordering menu entries.

Features that should be preserved

1. Multiple menus within course
2. Page history
3. External links
4. Section including ( Resources and modules )
5. Index view ( Gustav's enhancement )
6. Page including ( Gustav's enhancement )