Test case: create a new project, start recording, pause partway through, wait a
while, then unpause and stop recording. Look in the Sessions tab at the "Time"
column. Export to a text file and look at the value in the same column. The times
don't match.

For example, I have a session that the Khronos app's Session tab says started on
3/5/2006 at 15:00:00 and ended at 3/6/2006 at 0:28:06. The Time column says
3:07:31, which makes sense since I probably paused and restarted several times. But
the export line for this session looks like this:

10 3/5/2006 15:00:00 3/6/2006 0:28:06 6:20:35

I think that where it says 6:20:35 it should say 3:07:31. In fact I just noticed
that 3h07m31s + 6h20m35s adds up to the "wall clock" duration of the session, which
is 9h28m06s. Eek!

This seems like a bug, and kind of a scary one since the exported billable time is
very incorrect in cases where pausing during a session is used.