Notation codes not always shown/used at top level of hierarchy

[osma]

At which URL did you encounter the problem?

http://dev.finto.fi/udcs/en/

What steps will reproduce the problem?

1. Use UDC Summary
2. Open the Hierarchy tab from the vocabulary front page

What is the expected output? What do you see instead?

Expected to see the notation codes at the top level, namely "-" for AUXILIARY TABLES and "----" for MAIN TABLES, but they are not shown. Also, the list should be sorted by the notation code, not alphabetically (I believe "----" comes before "-" but not entirely sure).

If I open a concept directly, then the notation codes are shown and the order is different. E.g. http://dev.finto.fi/udcs/en/page/078887

Originally reported by Sandor Kopacsi on skosmos-users