Keeping universals consistent

Updated to reflect all of the changes to make them truly universal for
the themes.
Make palettes more universal

Separating out all the color palette choices into the partial so I can
just update one and copy over that one to all themes.
Make mixins a partial

More modularization. All the mixins can be shared among themes, since
they don’t get compiled unless they’re used.
Modularity and inline filter menu padding

Moving mixins and color palette into partials, adding a little padding
to inline filter menus so that the scrollbar when appearing doesn’t
cover content.
Include a wrapper around images

Making sure that if an image does not extend the full width of its
container, the name can drop to the next line.
Setting a baseline hyphenation behavior that should fix a lot of
instances where filter tokens and website addresses would not keep
their ellipsis behavior