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

[Jelmer Vernooij]

At the moment Bazaar will show a question mark in the progress bar if
the direction of data transfer is not known.  This seems like a waste of
space, and may be confusing to users. The attached patch simply makes
Bazaar not show any information about the direction of the data if it is
not known.

Simply providing information about the direction is impossible for
Subversion, since the svn libs don't pass that information along to bzr-svn.

Cheers,

Jelmer
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