Code review comment for ~cjwatson/launchpad:doc-vanilla

I've changed the logo to be the Launchpad logo, thanks.

The arrangement of the header links was somewhat deliberate, following the sort of thing you see in https://anbox-cloud.readthedocs.io/en/latest/ where the name of the product links to the product itself, and there are other links to areas such as documentation. I appreciate this may not be entirely obvious with only two links though!