lp bug: https://launchpad.net/bugs/1219655 fixed
bzr revid: alexandre.fayolle@camptocamp.com-
20130902062641-f8hzfnfo7ci2b9jy
its descendants will be displayed in the main tree. The value is ignored
for flat lists.
+create
+ set to 'false' to hide the link which allows to create a new
+ record. This works if the Tree view is the main view on screen
+ and also if it is displayed inside a form, for a one2many
+ relation. This works also for Form views.
+
+delete
+ set to 'false' to hide the link which allows to remove a
+ record. This works also on Form views.
+
Grouping Elements
+++++++++++++++++