Don't underline inline links by default

With https://forum.xwiki.org/t/underline-inline-links/13313 was introduced: https://www.xwiki.org/xwiki/bin/view/ReleaseNotes/Data/XWiki/16.3.0RC1/Entry005/ .
By default links are underlined, which in some cases may not look good, clutters the display or simply the line goes beyond text.
While the feature is very nice for accessibility reasons shouldn't be default for all users but activated for users who need it.
Also with the current behavior it's very hard to disable this feature for all users since there is no global option to change it.