Add Party Admins

[WaitingIdly]

changes in this PR:

• add the ability for an Owner of a party to promote members to admins, and demote admins back to members.
• split members view of party into Owner, Admins, and Members (skipping categories without people).
• when joining a party, sync everyone, not just yourself (fixes name not updating).
• fix issue where if the name was too long, the kick packet would attempt to process the trimmed name (ie ReallyLong... instead of ReallyLongName), causing it to fail. relevant for promoting/demoting users.

Admins can invite players to the party and kick members (but not admins) from it. note that "Admins" arent a new feature, but there was no way for it to actually be changed in-game. you could theoretically change the file to modify the role to be an admin, but that was the only way to become one.

[jchung01]

Looks good to me