Admin preferences CKEditor documentation link is not underlined when inline-link-only option is selected

This was initially highlighted in a WCAG automatic report.

Example of violation reported:

Validation in the test method [null]
Check for [org.xwiki.administration.test.po.AdministrationSectionPage] at http://xwikiweb:8080/xwiki/bin/admin/XWiki/XWikiPreferences?form_token=TCe6rZVm7XNI6xRlR8niGA&section=WYSIWYG.
Found [1] items

1: Links must be distinguishable without relying on color
Description: Ensure links are distinguished from surrounding text in a way that does not rely on color
Help URL: https://dequeuniversity.com/rules/axe/4.8/link-in-text-block?application=axeAPI
Help: Links must be distinguishable without relying on color
Impact: serious
Tags: cat.color, wcag2a, wcag141, TTv5, TT13.a, EN-301-549, EN-9.1.4.1

HTML element:
<a href="http://docs.ckeditor.com/#!/api/CKEDITOR.config">CKEditor documentation</a>
Selector: [.xHint > a]
Fix any of the following:
The link has insufficient color contrast of 1.41:1 with the surrounding text. (Minimum contrast is 3:1, link text: #2f70a7, surrounding text: #555555)
The link has no styling (such as underline) to distinguish it from the surrounding text

__________
Validation in the test method [null]
Check for [org.xwiki.administration.test.po.WYSIWYGEditorAdministrationSectionPage] at http://xwikiweb:8080/xwiki/bin/admin/XWiki/XWikiPreferences?form_token=TCe6rZVm7XNI6xRlR8niGA&section=WYSIWYG.
Found [1] items

1: Links must be distinguishable without relying on color
Description: Ensure links are distinguished from surrounding text in a way that does not rely on color
Help URL: https://dequeuniversity.com/rules/axe/4.8/link-in-text-block?application=axeAPI
Help: Links must be distinguishable without relying on color
Impact: serious
Tags: cat.color, wcag2a, wcag141, TTv5, TT13.a, EN-301-549, EN-9.1.4.1

HTML element:
<a href="http://docs.ckeditor.com/#!/api/CKEDITOR.config">CKEditor documentation</a>
Selector: [.xHint > a]
Fix any of the following:
The link has insufficient color contrast of 1.41:1 with the surrounding text. (Minimum contrast is 3:1, link text: #2f70a7, surrounding text: #555555)
The link has no styling (such as underline) to distinguish it from the surrounding text