[Merge] lp:~rpadovani/webbrowser-app/newTabRefactoring into lp:webbrowser-app

[Olivier Tilloy]

Review: Needs Fixing

I’m still seeing the new tab view being briefly instantiated and destroyed right away at startup, when restoring a tab that isn’t empty. This needs fixing, as it adds unnecessarily to the startup time (and the view can actually be seen for a split second, which is confusing).

Otherwise I verified that when switching from one new tab to another new tab the view isn’t destroyed and re-created, that’s good.
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https://code.launchpad.net/~rpadovani/webbrowser-app/newTabRefactoring/+merge/247498
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