[Merge] lp:~fboucault/webbrowser-app/downloads_emblem into lp:webbrowser-app/staging

[Olivier Tilloy]

One really cool thing is that if I initiate a long-running download and then close the browser, when I open it again the animated emblem is still there to remind me that I have an ongoing download.
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https://code.launchpad.net/~fboucault/webbrowser-app/downloads_emblem/+merge/319588
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