fix: elements/Select -> stop keydown event to prevent weird form behaviour

qui/controls/elements/Select.js

@@ -148,6 +148,7 @@ define('qui/controls/elements/Select', [
                 'class'    : 'qui-elements-select-list-search',
                 placeholder: this.getAttribute('placeholder'),
                 events     : {
+                    keydown: (event) => event.stop(),
                     keyup: function (event) {
                         if (event.key === 'down') {
                             this.down();