[CSS] Changed the brand colours.
Documentation - zebra plugin - fix dollar signs in English version
Documentation: Fixed a few broken links.
Documentation: zebra plugin - add space before percent sign - French
version
Remove non-breaking space
Merge pull request #4974 from EricDunsworth/v4.0-broken-link-fixes

Documentation: Fixed a few broken links.
Merge pull request #4969 from m14e/v4.0-fix-documentation-zebra-plugin-i18n

Documentation: Zebra plugin - i18n - fix $ and %
Share widget: Added the ability to customize the link CSS (fixes #4976)
Merge pull request #4978 from pjackson28/allowsharewidgetlinkclasses

Share widget: Added the ability to customize the link CSS (fixes #4976)
[CSS] Optimised colour overrides.
Merge pull request #4980 from thomasgohard/css-change-default-colours

[CSS] Change the default colours and cleaned up some of the colour overrides for Bootstrap