[Room][UserList] Introduce style delegate for user list

- Allow users to set a card name and parameters as their background banner
- Allow mods to white/blacklist cards
- Allow toggling back to the old display style

Took 7 minutes

Took 28 seconds

Took 2 minutes

Took 2 minutes

libcockatrice_network/libcockatrice/network/server/remote/server.h

@@ -64,6 +64,7 @@ public:
                                    QString &clientid,
                                    QString &clientVersion,
                                    QString &connectionType);
+    void broadcastUserInfoUpdate(Server_ProtocolHandler *source);
 
     const QMap<int, Server_Room *> &getRooms()
     {