Mafia: MAs on Dead Chat, Delayed Conversion Msg, more

-role.infoName: Changes the role's name on /roles, /sides and /priority.
-theme.delayedConversionMsg: When set to true, players converted during the night will only see their new help text once the night is over.
-Prevent Vote spam when voting for a theme (Fixing).
-MAs, sMA and auth that didn't join the game are automatically added to the Dead Chat.
Mafia Checker: infoName and delayedConversionMsg
Mafia: Remove Duplicates on /sides
Merge pull request #710 from IceKirby/patch-21

Mafia: MAs on Dead Chat, Delayed Conversion Msg