Add move operation for nodes in navigation mode

*Title: Add move operation for nodes in navigation mode

Incentive:
Moving nodes requires the user to edit the node then move one of the locations,
by having a move operation directly in the navigation interface will make the
UI easier to use.

*Documentation:
To move a node the 'content/move' and 'content/edit' permission is required, the user
must also have 'content/create' with for content class on the new location.

Two new actions has been added to content/action:

MoveNodeRequest:
This starts check current permissions and starts the browsing of new location
The browsing will start from the parent of the current node, only locations that
the user has 'content/create' permission will be selectable, also all locations (with parent)
are not selectable.

 - POST activation variable: MoveNodeButton
 - POST parameters:
   - NodeID (required) : ID of the node to move
   - ViewMode (optional) : Current viewmode, if missing 'full' is assumed
   - LanguageCode (optional) : Current language used to show node, if missing default object language is used.



MoveNode:
This performes the actual move.
If you wish to call this directly without the browse page you must supply the NewParentNode variable.

 - POST activation variable: MoveNodeAction
 - POST parameters:
   - NodeID (required) : ID of the node to move
   - ViewMode (optional) : Current viewmode, if missing 'full' is assumed
   - LanguageCode (optional) : Current language used to show node, if missing default object language is used.
   - NewParentNode (optional) : The ID of the new parent node, if this is supplied the value from the
                                browse operation will not be used. You can use to automatically move a node
                                to a defined location. Note: Permission checking is still performed so it
                                may fail because of that.

*Testing:

*SVN Revisions: