implemented graying out chat history from log - EXT-5102  IM chat from previous sessions should be grayed out
implemented graying out chat history from log - EXT-5102  IM chat from previous sessions should be grayed out

gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm,gabeharms/firestorm