Bug 33272: Color of the "(remove)" link when an item is in the cart (OPAC)

Bug 33272: Color of the "(remove)" link when an item is in the cart (OPAC)

This patch improves the CSS for styling the OPAC cart's "remove" link in
search results so that the color is consistent within alternating table
row colors.

To test, apply the patch and rebuild the OPAC CSS.

- Perform a search in the OPAC which will return multiple results.
- Click the "Add to cart" link next to multiple results.
- The "remove" link which appears should be the correct red color
  whether the table row background is white or grey.

Signed-off-by: Caroline Cyr La Rose <caroline.cyr-la-rose@inlibro.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>