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

[Olivier Tilloy]

This looks good, but shouldn't the highlight for the selected item use the standard UITK focus ring, instead of a custom background color?
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https://code.launchpad.net/~fboucault/webbrowser-app/combo_box_better_ux/+merge/316571
Your team Ubuntu Phablet Team is requested to review the proposed merge of lp:~fboucault/webbrowser-app/combo_box_better_ux into lp:webbrowser-app/staging.