* The corresponding floater must be docked to the conversations floater and the conversations floater must be closed for the button to flash
* The option to flash when new (group) IMs arrived is only available if IMs are shown in tabs and not as separate windows
* LLChatHistory moved to FSChatHistory
* LLFloaterNearbyChat moved to FSFloaterNearbyChat
* LLIMFloater moved to FSFloaterIM
* LLIMFloaterContainer moved to FSFloaterIMContainer
* LLNearbyChatbarListener moved to FSNearbyChatbarListener
* LLNearbyChatControl moved to FSNearbyChatControl
* LLNearbyChatHub moved to FSNearbyChatHub
* floater_im_container.xml moved to floater_fs_im_container.xml
* floater_im_session.xml moved to floater_fs_im_session.xml
* floater_nearby_chat.xml moved to floater_fs_nearby_chat.xml
* widget chat_history.xml moved to fs_chat_history
* widget nearby_chat_control.xml moved to fs_nearby_chat_control.xml