Ability to change default behavior of Chats being torn off so that all chats appear minimized upon opening, as well, regardless of conditions.

Adds debug setting OtherChatsTornOffAndMinimized
Not added to ui xml because the default behavior is likely fine.
HippoGridManager and HippoLimits updated with Aurora bits from Voodoo.

Adds isAurora() to HippoGridManager
Adds setAuroraLimits and Aurora case to setLimits() in HippoLimits
WindLightRefresh added for compliance with Aurora's windlight event system.