catalog nav: rely on native Navigator for arrows (remove manual move handlers); only set focus once

plugin.js

@@ -108,13 +108,6 @@
                         Lampa.Controller.collectionSet(g);
                         if (first) Lampa.Controller.collectionFocus(cards[0], g);
                     },
-                    right: function () { Navigator.move('right'); },
-                    left: function () {
-                        if (Navigator.canmove('left')) Navigator.move('left');
-                        else Lampa.Controller.toggle('menu');
-                    },
-                    up: function () { Navigator.move('up'); },
-                    down: function () { Navigator.move('down'); },
                     enter: function () {
                         var el = g.find('.card.selector.focus')[0] || cards[0];
                         if (!el) return;