Accessibility cookie settings

[Andrea-Guevara]

References

• Fixes #2668

Description

Adding and changing some classes in the global scss to make the cookie settings more accessible.

Instructions for Reviewers

List of changes in this PR:

• Added the variable "--very-dark-cyan" in _custom_variables.scss.
• Removed the variable ".cm-btn.cm-btn-success.cm-btn-accept-all" and its styling as it was no longer needed.
• Styled the "Accept all" button by overwriting the style of the ".klaro .cookie-modal .cm-btn.cm-btn-success.cm-btn-accept-all" variables.
• Added "text-decoration: underline;" to the anchors.
• Changed the color of some informational texts, which were previously gray and are now lighter to improve contrast.
• Changed the color of the "Save" button by overwriting the styling of the variables: .klaro .cookie-modal .cm-btn.cm-btn-info.

Checklist

• [ ] Visit https://sandbox.dspace.org in an Incognito browser
• [ ] Klaro cookie popup should appear. Click on "Customize" to bring up the screen above
• [ ] Expand all sections on that screen.
• [ ] Run an accessibility scanner (WAVE or "axe DevTools) and check that the accessibility test is positive.