MD Settings: clean up text controls (links, buttons)

chrome/browser/resources/settings/device_page/stylus.html

Index: chrome/browser/resources/settings/device_page/stylus.html
diff --git a/chrome/browser/resources/settings/device_page/stylus.html b/chrome/browser/resources/settings/device_page/stylus.html
index 2d4a4737370bbbb3357c04dfd5064bde03621a6d..f6620b6685417483d838b2f06ffa7d6f6331a179 100644
--- a/chrome/browser/resources/settings/device_page/stylus.html
+++ b/chrome/browser/resources/settings/device_page/stylus.html
@@ -22,11 +22,13 @@
       </settings-toggle-button>
     </div>
 
+    <!-- TODO(scottchen): Make a proper a[href].settings-box with
+         icon-external (see: https://crbug.com/684005)-->
     <div class="settings-box">
       <!-- TODO(jdufault): This should launch an intent (using the
         enable-intent-picker flag) that opens up the play store to a curated
         list of apps. -->
-      <a is="action-link" target="_blank"
+      <a target="_blank"
          href="https://play.google.com/store/apps/collection/promotion_30023cb_stylus_apps">
         $i18n{stylusFindMoreApps}
       </a>