Move buttons definition to separate file

Author: jissereitsma

app/code/Magento/Ui/view/base/web/js/form/adapter.js

@@ -5,15 +5,11 @@
 define([
     'jquery',
     'underscore'
-], function ($, _) {
+    './adapter/buttons'
+], function ($, _, buttons) {
     'use strict';
 
-    var buttons = {
-            'reset':            '#reset',
-            'save':             '#save',
-            'saveAndContinue':  '#save_and_continue'
-        },
-        selectorPrefix = '',
+    var selectorPrefix = '',
         eventPrefix;
 
     /**

app/code/Magento/Ui/view/base/web/js/form/adapter/buttons.js

@@ -0,0 +1,15 @@
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+
+/**
+ * @api
+ */
+define(function () {
+    return {
+        'reset': '#reset',
+        'save': '#save',
+        'saveAndContinue': '#save_and_continue'
+    }
+});