Fixes for page and proofread layout

Top and bottom of the "page" lack the border line which makes the
layout look broken. This was broken in previous refactorings that
affected the structure of HTML. This patchset provides CSS fixes
to adjust that.

Change-Id: I674eb3faf042e68174418965e957a38611b76ed2
Merge "Fixes for page and proofread layout"