duplicated entries in site tab of the defaultfiredocs publication

Hi Andreas, hi Lenya Devs,

The menu.xml file provided with the defaultfiredocs publication  
results in some duplicated menu entries in the site tab like "Change  
NodeId".
One entry comes form the this file, the other from modules-core/ 
sitemanagement/config/menu.xml.
So I would like to remove the entries from menu.xml of the  
defaultfiredocs publication.

In the subversion history of modules-core/sitemanagement/config/ 
menu.xml (r730697) I found the following note from you:
"Don't use uc:usecase for ChangeNodeId usecase to avoid expensive  
precondition checks when the menu is loaded."
But in the defaultfiredocs publication's menu.xml uc:usecase is used.
Do you remember how expensive the checks are ?
If they are not too expensive I would like to use them in modules-core/ 
sitemanagement/config/menu.xml, because you can see directly that it's  
impossible to change the NodeId of checked out documents.

WDYT ?

Best

Rudolf