split showing titles in confirmation from actual delete functionality (n...

...eeds full paths, especially in Plone 4.3.3)
To make collective.actions.delete work toegether with Products.CMFPlone 4.3.3, this is necessary.
Since https://dev.plone.org/ticket/13603 is still open, the change in Products.CMFPlone might need to be updated, but regardless, the code is now updated so it will always use full paths to do the actual deletion.