[Merge] lp:~artmello/webbrowser-app/webbrowser-app-changes_on_new_tab into lp:webbrowser-app

[Olivier Tilloy]

Review: Needs Fixing

In Favicon.qml:

 - the id is unused, it can be removed

 - you need to add an import for "Ubuntu.Components 0.1", as you’re referring to units.dp(), which is part of the Ubuntu UITK
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https://code.launchpad.net/~artmello/webbrowser-app/webbrowser-app-changes_on_new_tab/+merge/226300
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