[Merge] lp:~elopio/webbrowser-app/test_add_bookmark into lp:webbrowser-app

[Olivier Tilloy]

Review: Disapprove

The new UI (phase 1) has landed, with a new way of managing bookmarks, and I made sure the functionality comes with autopilot tests from the start, so this branch isn’t needed anymore. Thanks Leo for your work on it.
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https://code.launchpad.net/~elopio/webbrowser-app/test_add_bookmark/+merge/205080
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