Do not clear tree_states when loading ids

The tree state must be set after loading ids but we can rely on the stored
state.

issue10366
review361811002

tryton/gui/window/view_form/screen/screen.py

@@ -910,7 +910,6 @@ class Screen(SignalEvent):
         return json_domain
 
     def load(self, ids, set_cursor=True, modified=False, position=-1):
-        self.tree_states.clear()
         self.tree_states_done.clear()
         self.group.load(ids, modified=modified, position=position)
         self.current_view.reset()