Define $active-color in terms of $primary-color

Use jQuery throttle library

Scrollspy-style updating of hash and TOC highlighting

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Clicking TOC links changes hash fragment (#2019)

* Fix smooth scroll breaking back button #1767
* Change URL's hash fragment when clicking on TOC
* Switch from hashchange to popstate event handler

This seems to have better behavior with the Forward button, on page load,
and always scrolls in the right direction.

Close #1767 

Bump version to 4.14.2

Release 4.14.2 💎

Update copyright year

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Accessibility: Add aria-label to the search button (#2014)

* Accessibility: Add aria-label to the search button
* Update button aria text
* Add aria text to menu toggle
* Add span for search toggle
* Update span for menu label & remove aria
* Update ui-text.yml to add search_label

Fix wide tables that overflow parent container

Close #2008

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lunr 2.3.5 update (#2010)

Fix typo

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shorter IE conditional statement (#2006)

saves 5 bytes :-)

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Persian Translation of UI Elements (#2004)

* Add Persian translation to ui-text.yml
* Mention the added Persian translation in the documentation

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[Bug fix]: Added missing Staticman Spanish UI text (#1997)

Taken from line 91 of 5d-eu/messages.php@ec56008