Add styling for Footnotes

[designerbrent]

We need to add some styling for the footnote module. It includes a list of footnotes at the bottom of the page that are wrapped in a <ol> with the class of footnotes. We need to add at least a line on top and make the font just a little smaller.

Something like the following:

ol.footnotes li {
font-size: .85rem;
}
.footnotes {
padding-top: 1.25rem;
border-top: 1px solid #717171;
}

[designerbrent]

This will be fixed in 3.6.5.