Small fix for copy on help sidebar

See ticket #955 - "Help" Design changes for content area and sidebar
Styling fixes for Help main content pages; also includes a fix for
additional font-family declarations that did not have any fallback fonts
set up.

See ticket #955 - "Help" Design changes for content area and sidebar
Merge branch '1.3.x' of github.com:livinglab/openlab into 1.3.x