Fix #112904: Outliner: Bones appear in different places in different modes

c6b553d57c added the bone collection in
outliner. However, there is change in tree element order when switched
between pose and edit/object mode. Because order of tree building is
`edit bones -> bone collection -> pose bones`
To keep tree structure consistent between different modes, first draw
pose bone and then the ebone/bone collection.

Pull Request: https://projects.blender.org/blender/blender/pulls/112908

source/blender/editors/space_outliner/tree/tree_element_id_object.cc

@@ -40,9 +40,8 @@ void TreeElementIDObject::expand(SpaceOutliner & /*space_outliner*/) const
   object_.id.newid = (ID *)(&legacy_te_);
 
   expand_animation_data(object_.adt);
-
-  expand_data();
   expand_pose();
+  expand_data();
   expand_materials();
   expand_constraints();
   expand_modifiers();