[Merge] lp:~osomon/webbrowser-app/preview-hoveredUrl into lp:webbrowser-app

[Michael Terry]

Review: Approve test

I don't want to review the code itself for this project since I'm not really involved.  But I tested this, and it worked great.  Thanks Olivier!
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https://code.launchpad.net/~osomon/webbrowser-app/preview-hoveredUrl/+merge/294021
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