fix

assets/toolkit/toolkit.css

@@ -768,6 +768,7 @@
     box-shadow: 0 2px 5px 0 rgba(0, 0, 0, .16), 0 2px 10px 0 rgba(0, 0, 0, .12);
     border-radius: 0;
     font-weight: normal;
+    vertical-align: 0.35em;
 }
 .kit-button:before {
     content: '';