fix(ui): change underlines to default browser style (#38819)

Remove all underline style customization on links, letting the browser defaults apply

web_src/css/base.css

@@ -273,12 +273,10 @@ a {
   color: var(--color-primary);
   cursor: pointer;
   text-decoration-line: none;
-  text-decoration-skip-ink: all;
 }
 
 a:hover {
   text-decoration-line: underline;
-  text-underline-position: under; /* necessary for CJK fonts, otherwise, default "auto" makes the underline cross-over the CJK text bottom */
 }
 
 /* a = always colored, underlined on hover */