[Merge] lp:~ahayzen/webbrowser-app/migrate-to-tabs-component into lp:webbrowser-app/staging

[Andrew Hayzen]

Note to self, forgot todo this one (even wrote TODO :') ).

2) Can you please update the copyright year of all changed files to 2017 ?

TODO
-- 
https://code.launchpad.net/~ahayzen/webbrowser-app/migrate-to-tabs-component/+merge/312340
Your team Ubuntu Phablet Team is subscribed to branch lp:webbrowser-app/staging.