[merge] MVC progress bars, and indication of network traffic

[Martin Pool]

On 17 Dec 2008, Jonathan Lange <jml at canonical.com> wrote:

> If you stop supporting it, you need to provide something else to
> replace it -- we use it to reset timeouts when mirroring branches.

I checked offline with jml, and he's overriding the ui.ui_factory API
with his own class.  That code might need to be updated, but it's still
conceptually compatible with what's happening here, and I think this is
a step towards a cleaner UI layer.

-- 
Martin      <http://launchpad.net/~mbp>