Update crumb styles.

src/_h5ai/public/css/inc/ext/crumb.less

@@ -42,11 +42,13 @@
         padding: 0 8px;
     }
     .hint {
-        width: 16px;
-        height: 16px;
-        padding: 16px 4px 16px 0;
+        width: 20px;
+        height: 20px;
+        padding: 16px 0 0 0;
         line-height: 48px;
         display: inline-block;
         vertical-align: top;
+        position: relative;
+        top: -2px;
     }
 }