XWIKI-22184: Change the underlining inline links behavior on a minimal install (#3126)

* Reduced the specificity of the underlining preference selector so that it's matched even during docker testing.

xwiki-platform-core/xwiki-platform-flamingo/xwiki-platform-flamingo-skin/xwiki-platform-flamingo-skin-resources/src/main/resources/flamingo/less/general.less

@@ -134,7 +134,7 @@ img {
 }
 
 // User preferences ===========================================================
-body.content {
+body {
   /* We apply various user preference related styles to the content of the page.
    We use classes that are added to the body itself in htmlheader.vm */
   // Link underlining preference