Add translations for new icons in game GUI

src/main/resources/lang_en.properties

@@ -56,6 +56,13 @@ lobby.menu.game.quick_join=Quick Join
 lobby.menu.game.map_select=Map Select
 lobby.menu.game.map_select.no_permission=No Permission!
 lobby.menu.game.map_select.disabled=Map Select Disabled!
+lobby.menu.game.cosmetics=Cosmetics
+lobby.menu.game.no_cosmetics=No cosmetics available
+lobby.menu.game.leaderboards=Leaderboards
+lobby.menu.game.no_leaderboards=No leaderboards available
+lobby.menu.game.help=How to Play
+lobby.menu.game.help.description=Visit our website to learn more about {0}.
+lobby.menu.game.help.message=Visit our website to learn more about {0}: {1}
 lobby.menu.random_game.title=Random Game
 
 lobby.menu.mode.title=Game Mode Select