Listbox: don't generate link for summary line

It would be a link to the domain, category or temp domain, which is useless for
end users.
Signed-off-by: Aurélien Calonne <aurel@nexedi.com>

product/ERP5Form/ListBox.py

@@ -2383,7 +2383,7 @@ class ListBoxHTMLRendererLine(ListBoxRendererLine):
         editable_field = renderer.getEditableField(alias)
 
       # Prepare link value - we now use it for both static and field rendering
-      no_link = False
+      no_link = self.isSummary()
       url_method = None
       url = None