I've increased the chat buffer size for the ChatConversationPanel from
3000 to 50,000 chars.
Before this change the IRC chat conversations got really short,
especially after modifing the "original_message" attribute value to
store the original message as base64. I traced back the original value
to somewhere in 2009 and there does not seem to be much (documented)
reasoning behind the choice.
I've tested this buffer and it now holds about 1,5 hours of conversation
in a fairly active chat room, so that seems reasonable to me. Given that
we're talking characters, this shouldn't have much impact on memory usage.