"Raw" mode with timings needs a design

[alvarlagerlof]

Problem

The "Raw" mode currently dumps message data into a list. It is not that easy to parse, and none of the timestamps are formatted.

Proposed solution

The key information here is probably the text and the timings. So this should probably be the focus when rendering the list. Timestamps would potentially be more useful if they showed the diffs from the first message, or perhaps the duration of each chunk. Headers need further consideration, see #225