Context on lastdisconnect replication

As it is, lastdisconnect replays text immediately following the disconnect, but nothing before. This replayed text can be difficult to recognize as part of a conversation without the previous lines. Ideally a small portion (10-15 lines, or 5-10 minutes?) of the text leading up to the disconnect should be included as well, to give the replayed text context, and provide continuity between sessions. It's also easy in the event of a client crash to miss messages that occur after a UI failure, but before the disconnect.