Fix modified state on list view

Let the Field.set_client set the modified state.
The editing test for treeview doesn't work properly.

tryton/gui/window/view_form/view/list.py

@@ -336,8 +336,7 @@ class ViewList(ParserView):
 
     @property
     def modified(self):
-        return any(c.renderer.props.editing
-            for c in self.widget_tree.cells.itervalues())
+        return False
 
     def get_fields(self):
         return [col.name for col in self.widget_tree.get_columns() if col.name]

tryton/gui/window/view_form/view/list_gtk/parser.py

@@ -390,12 +390,6 @@ class Char(object):
             callback()
 
     def editing_started(self, cell, editable, path):
-        store = self.treeview.get_model()
-        record = store.get_value(store.get_iter(path), 0)
-
-        def send():
-            record.signal('record-modified')
-        gobject.idle_add(send)
         return False