Michael Gratton authored Oct 30, 2019 and Michael Gratton committed Nov 07, 2019

This allows a single widget to get constructed to handle email actions,
rather than every single ConversationEmail having to do so, and thus
related signals can also be moved to and emitted from
ConversationListBox, so that MainWindow only has to hook up to a single
object's signals for a conversation, not every email in the
conversation.