Button: remove text-decoration when wrapped with a <Link/>

app/soapbox/components/button.js

@@ -66,7 +66,7 @@ export default class Button extends React.PureComponent {
 
     if (this.props.to) {
       return (
-        <Link to={this.props.to} tabIndex={-1}>
+        <Link to={this.props.to} tabIndex={-1} className='button__link'>
           {btn}
         </Link>
       );

app/styles/components/buttons.scss

@@ -37,6 +37,10 @@ button {
     margin-right: 5px;
   }
 
+  &__link {
+    text-decoration: none;
+  }
+
   &:active,
   &:focus,
   &:hover {