Revert "fix(SW-2101): do not apply underline to Material icons inside Link and Button"

This reverts commit 35f9c3aab5.

apps/scandic-web/components/TempDesignSystem/Button/button.module.css

@@ -278,10 +278,7 @@ a.default {
 .baseText:focus,
 .baseText:hover {
   color: var(--Base-Button-Text-On-Fill-Hover);
-
-  & span:not(:global(.material-symbols)) {
-    text-decoration: underline;
-  }
+  text-decoration: underline;
 }
 
 .baseText:disabled {
@@ -300,6 +297,7 @@ a.default {
 .icon.baseText:focus svg *,
 .icon.baseText:hover svg * {
   fill: var(--Base-Button-Text-On-Fill-Hover);
+  text-decoration: underline;
 }
 
 .icon.baseText:disabled svg,