Clean up conversations view in Message Detail panel
Visually separate replies from a long thread within their own box with Sender and basic header information at the top of the box the way Apple Mail displays conversations, as well as truncating each reply so that each box does not include all the quoted text from all previous replies. This is the way Gmail allows expansion of a threaded conversation to only view the last senders reply, and by clicking further all the quoted text can be expanded as well. This makes it much easier to view the entire conversation. The heading of each box with Sender, timestamp, etc. details, should be more easily distinguishable from the text of the thread to make it easier to see who replied with what.