Update CHANGELOG and history

Update CHANGELOG and history

#1653: Add GitLab social icon brand color (#1654)

Fix "Back to Top" links

Pages that use header overlays were missing `#page-title` anchors on the `<h1>` element.

Release 4.11.2 :gem:

Update Font Awesome to 5.0.12

Update CHANGELOG and history

Add option to anonymize analytics ip address (#1636)

* Add option to anonymize analytics ip address

* Add option to anonymize analytics ip address in google tag

Update Font Awesome to v5.0.11 (#1620)

* Update Font Awesome to v5.0.10

https://github.com/FortAwesome/Font-Awesome/blob/master/CHANGELOG.md

* Update scripts.html

Add Slovak localized UI text strings

Add Slovak translation of ui-text (#1613)

Add conditionals for showing  reCaptcha keys in form

Add "Back to Top" text string

Fix UI-text variable and add Danish Translation for Back to top (#1598)

* Added Danish Translation for Back to top

* Update categories.html

* Update tags.html

* Update posts.html

Update CHANGELOG and history

Update Font Awesome (#1605)

REF: https://github.com/FortAwesome/Font-Awesome/blob/master/CHANGELOG.md

Fix typo

Remove link

Release 4.11.1 :gem:

Use `relative_url` filter