MAGETWO-11129: Found records in global search in Backend can't be selected via keyboard

- added keyup/down support

Author: Ihor Melnychenko

lib/web/mage/backend/suggest.js

@@ -179,7 +179,10 @@
             this._on($.extend({
                 keydown: function (event) {
                     var keyCode = $.ui.keyCode,
-                        suggestList;
+                        suggestList,
+                        hasSuggestedItems,
+                        hasSelectedItems,
+                        selectedItem;
                     switch (event.keyCode) {
                         case keyCode.PAGE_UP:
                         case keyCode.UP:
@@ -189,9 +192,12 @@
                             }
 
                             suggestList = event.currentTarget.parentNode.getElementsByTagName('ul')[0];
-                            if (suggestList) {
-                                $(suggestList.getElementsByClassName('_active')[0]).removeClass('_active').prev().addClass('_active');;
+                            hasSuggestedItems = event.currentTarget.parentNode.getElementsByTagName('ul')[0].children.length >= 0;
+                            if (hasSuggestedItems) {
+                                selectedItem =  $(suggestList.getElementsByClassName('_active')[0]).removeClass('_active').prev().addClass('_active');
+                                event.currentTarget.value = selectedItem.find("a").text();
                             }
+
                             break;
                         case keyCode.PAGE_DOWN:
                         case keyCode.DOWN:
@@ -201,11 +207,15 @@
                             }
 
                             suggestList = event.currentTarget.parentNode.getElementsByTagName('ul')[0];
-                            if(suggestList){
-                                if(suggestList.getElementsByClassName('_active').length === 0) {
-                                    $(suggestList.children[0]).addClass('_active');
+                            hasSuggestedItems = event.currentTarget.parentNode.getElementsByTagName('ul')[0].children.length >= 0;
+                            if(hasSuggestedItems){
+                                hasSelectedItems = suggestList.getElementsByClassName('_active').length === 0;
+                                if(hasSelectedItems) {
+                                    selectedItem = $(suggestList.children[0]).addClass('_active');
+                                    event.currentTarget.value = selectedItem.find("a").text();
                                 }else {
-                                    $(suggestList.getElementsByClassName('_active')[0]).removeClass('_active').next().addClass('_active');
+                                    selectedItem = $(suggestList.getElementsByClassName('_active')[0]).removeClass('_active').next().addClass('_active');
+                                    event.currentTarget.value = selectedItem.find("a").text();
                                 }
                             }
 
@@ -218,6 +228,7 @@
                             break;
                         case keyCode.ENTER:
                         case keyCode.NUMPAD_ENTER:
+
                             if (this.isDropdownShown() && this._focused) {
                                 this._proxyEvents(event);
                                 event.preventDefault();