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

[Aaron Bentley]

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Matthew D. Fuller wrote:
> On Tue, Apr 07, 2009 at 10:31:00AM +0200 I heard the voice of
> Jelmer Vernooij, and lo! it spake thus:
>> I don't think there is a particular value in showing we don't know
>> something.
> 
> I agree.

Well, in the general case, the value of telling the user we don't know
something is that then the user understands why we aren't telling them
something.

Aaron
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