Add LMS support.

Adds LMS gametype support to stats:

• Scoreboard partial with game specific fields shown
• Amendments to the "blank game" precheck to account for lack of score
• Addition of the LMS icon in the games index page (aka recent games view)

This one didn't require any Luma font or CSS changes because it has been in the game for so long. It just had bugs until somewhat recently!

@terencehill @drjaska please have a look.