[Merge] lp:~abreu-alexandre/webbrowser-app/container-print-help-when-no-appid into lp:webbrowser-app

[Olivier Tilloy]

Review: Approve

Looks good to me now, thanks!
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https://code.launchpad.net/~abreu-alexandre/webbrowser-app/container-print-help-when-no-appid/+merge/297220
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