Rapidly connecting clients prevent scrolling in private messages

[ghost]

Pretty much as the title says. During a spam attack where users are being rapidly connected to flood a room, the client will continue to reset your scroll position to the bottom, even in a private message window. This can inhibit scrolling upwards. To test this, use the Superp00ts GoDog library to rapidly populate users in any given room, while in a private message that extends past the screen.