please add more browse game filters

[mophydeen]

add more filters to the browser:
- continent: EU, NA, SA, Africa, Azia, ... (setting in server config)
- players: empty, full, somePlaying
- dont show 0m playtime
- gamemode: none, launch x rocket(s), pretty bus, ... (setting in server config)

[ssilk]

Added to viewtopic.php?f=80&t=32968 Collection of Of Ideas around Multiplayer: Lobby-Features, Joining, Mod&Game-Loading, ...