folder_contents and INavigationRoot problems

[thet]

When folder_contents is called on a INavigationRoot rooted subsite and some item is copied, then navigated up to the main portal site (which should be possible with #83 ), then pasted the copied object isn't pasted where we've navigated to but on the INavigationRoot object.

This is due to use of zope.component.hooks.getSite, which returns the INavigationRoot object.
Fix is coming...