fix underlined button

css/basic.css

@@ -22,6 +22,10 @@
 	visibility: hidden;
 	transition: 0.3s ease-out;
 }
+#dokuwiki__sidebar_close_btn,
+#dokuwiki__sidebar_show_btn {
+        text-decoration: none;
+}
 #dokuwiki__sidebar_close_btn {
 	float: right;
 }