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 mixins a partial

More modularization. All the mixins can be shared among themes,
sincethey don’t get compiled unless they’re used.
Make image on card view a background image

Since the images uploaded won’t always be squares, I’m making it so
that they’re the background image of these divs, cropped to the center.
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.
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