Fix arrow keydown handling bugs

Author: Graham Butler

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@author.io/element-menu",
-  "version": "1.0.14",
+  "version": "1.0.15",
   "description": "author-menu custom element (web component).",
   "main": "dist/author-menu.min.js",
   "scripts": {

showroom/dist/css/main.css

@@ -1,6 +1,6 @@
 /**
  * author-menu-showroom v1.0.0 generated on Mon Apr 01 2019.
- * Built at 14:04:44 GMT-0700 (Pacific Daylight Time)
+ * Built at 14:55:40 GMT-0700 (Pacific Daylight Time)
  * Copyright (c) 2019 Author.io
  */
 "use strict";var Demo=new NGNX.VIEW.Registry({selector:".demo",namespace:"demo.",init:function(){console.log("works")}});