Multi site integration for pages [#47492157], details include:

The pages view dispatcher now supports multiple sites.
get_page and filter_pages template tags are now both sites enabled.
The admin change list should indicate to which site a tree belongs, if sites is enabled.
Multi site integration for the navbar tag.
New move icon. Added a 'duplicate' icon
Admin users can now also duplicate a page and it's current content. [#50252099]
Fixed a bug that caused pages to expand/collapse incorrectly. During this update also removed the requirement for the custom change list provided by mptt and due to that the extra one ostinato provided for grappelli. The list pages now make use of django's normal result list.
mini cleanup
A child node cannot be the parent node of it's parent node.
1.1 beta version bump