Remove validation of unused XML attributes

Those XML attributes are no more allowed in XML.
The domain is not only allowed in dashboard and it is not a field domain.

issue3310
review986002
Store selection tree state

review822002

--HG--
rename : trytond/ir/view/ui_view_tree_expanded_state_form.xml => trytond/ir/view/ui_view_tree_state_form.xml
rename : trytond/ir/view/ui_view_tree_expanded_state_list.xml => trytond/ir/view/ui_view_tree_state_list.xml