LP#1746365 Change default staff link colors to provide adequate contrast

LP#1746365 Change default staff link colors to provide adequate contrast

The default link color from bootstrap works well on white backgrounds, but
doesn't provide adequate contrast once the background color is changed.
This introduces accessbility problems, particularly in cases where linked
text displays on a selected grid row that uses a light blue background
color. This change provides a darker default link color.

Signed-off-by: Kathy Lussier <klussier@masslnc.org>
Signed-off-by: Cesar Velez <cesar.velez@equinoxinitiative.org>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>