[Buildbot] #3226: Fix Google-reported mobility issues on docs.bb.net

[Buildbot trac]

#3226: Fix Google-reported mobility issues on docs.bb.net
------------------------+-------------------
Reporter:  dustin       |      Owner:
    Type:  enhancement  |     Status:  new
Priority:  minor        |  Milestone:  0.9.+
 Version:  master       |   Keywords:  docs
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 * viewport not configured --
 https://developers.google.com/web/fundamentals/layouts/rwd-fundamentals
 /set-the-viewport?hl=en
 * small font size --
 https://developers.google.com/speed/docs/insights/UseLegibleFontSizes
 * touch elements too close --
 https://developers.google.com/speed/docs/insights/SizeTapTargetsAppropriately
 * content not sized to the viewport --
 https://developers.google.com/web/fundamentals/layouts/rwd-fundamentals
 /size-content-to-the-viewport

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Ticket URL: <http://trac.buildbot.net/ticket/3226>
Buildbot <http://buildbot.net/>
Buildbot: build/test automation