Add "shortname" for game title

[RyanBram]

This feature exists for platform editing, but not for game titles. Adding shortname to games will help arrange games by release chronology.

For example, with the current feature, Final Fantasy IX will always appear before Final Fantasy VI, because alphabetically the letter I comes before the letter V, even though the letters represent numbers.

By using shortname, the games can be organized by number, for example FF6 and FF9 and then sorted by the short titles.

Thank you.