[MERGE] Hide the transport direction in the progress bar if it is unknown.

[Robert Collins]

On Wed, 2009-04-08 at 13:52 +0900, Stephen J. Turnbull wrote:
> Jelmer Vernooij writes:
> 
>  > speeds/ETA are not necessarily correct anymore. X or = or >< makes more
>  > sense to me (indicating bidirectional traffic).
> 
> "X" will very likely be misunderstood by Japanese, who universally use
> it (even as a gesture in conversation) to mean "in conflict",
> "erroneous", "unsuccessful", or simply "no".

An alternative approach would be to use two columns for direction. Then
we can show <> when traffic is actually going in both directions
concurrently... strangely that does happen :). And if we don't know then
<> will at least be something that shows up from time to time anyway.

-Rob
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