Hide right sidebar on start if screen narrower than 600px

so at last you can see something that looks like Node-RED

editor/js/ui/sidebar.js

@@ -141,6 +141,8 @@ RED.sidebar = (function() {
         RED.keyboard.add(/* SPACE */ 32,{ctrl:true},function(){RED.menu.setSelected("menu-item-sidebar",!RED.menu.isSelected("menu-item-sidebar"));d3.event.preventDefault();});
         showSidebar();
         RED.sidebar.info.show();
+        // hide info bar at start if screen rather narrow...
+        if ($(window).width() < 600) { toggleSidebar(); }
     }
     
     var eventHandler = (function() {