[Merge] lp:~uriboni/webbrowser-app/undo-close-tab into lp:webbrowser-app

[Olivier Tilloy]

Review: Needs Fixing

In test_undo_close_tab_incognito, you’re not checking which tabs are being restored, only the number of webviews after restoring a tab. And since you’re using the same URL for all tabs, the test doesn’t actually verify that it’s not restoring an incognito tab (it could be incognito or not, we won’t know unless we use different URLs for each tab.
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https://code.launchpad.net/~uriboni/webbrowser-app/undo-close-tab/+merge/275849
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