Fix image preview in replies and threads #366
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Hi,
This PR is a fix for #362
The root cause was that the image protocol from a reply header was being ignored.
An image in a reply header is now handled in the same way as an image in the body of the message, with the image position offsets modified to account for the difference in formatting (vertical lines, indent, etc).
It was necessary to break out
Message::show_msg
fromMessageFormatter::push_in_reply
due to the lifetime of the image protocol.Message::show_with_preview
now returns the image protocols of both the body and the reply header.Scrollback::render
was updated to handle this.