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.
Universal sort, filter, and pagination styles

Separating out all the style choices for these components into a
partial so I can just update one and copy over that one to all themes.
Keeps the components always consistent.
Make mixing a partial

More modularization. All the mixins can be shared among themes, since
they don’t get compiled unless they’re used.
Modularity, removing span styles, and adding back sorts

Moving mixins and color palette into partials, removing the ellipsis
behavior for titles at the small size, and adding back in relevant
styles for the table to have sort controls visible always. Also,
removing extra passing on column headers since we currently can’t
showcase sort direction there.
Heading off hyphenation behavior

Setting a baseline hyphenation behavior that should fix a lot of
instances where filter tokens and website addresses would not keep
their ellipsis behavior
Compiled CSS

Refer to SASS commits to see what specifically changed.