Fixes #21415: Go back to text-decoration: underline

src/vs/editor/common/modes/supports/tokenization.ts

@@ -399,6 +399,6 @@ export function generateTokensCSSForColorMap(colorMap: Color[]): string {
 	}
 	rules.push('.mtki { font-style: italic; }');
 	rules.push('.mtkb { font-weight: bold; }');
-	rules.push('.mtku { border-bottom: 1px solid; border-color: currentColor; }');
+	rules.push('.mtku { text-decoration: underline; }');
 	return rules.join('\n');
 }

src/vs/editor/contrib/links/browser/links.css

@@ -4,9 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 .monaco-editor .detected-link,
 .monaco-editor .detected-link-active {
-	border-bottom: 1px solid;
-	border-color: currentColor;
-	text-decoration: none !important;
+	text-decoration: underline;
 }
 
 .monaco-editor .detected-link-active {