Merge remote-tracking branch 'remotes/github/MAGETWO-96407' into EPAM-PR-30

Author: VeronikaYarats

lib/web/mage/dataPost.js

@@ -57,7 +57,7 @@ define([
          */
         postData: function (params) {
             var formKey = $(this.options.formKeyInputSelector).val(),
-                $form;
+                $form, input;
 
             if (formKey) {
                 params.data['form_key'] = formKey;
@@ -67,6 +67,19 @@ define([
                 data: params
             }));
 
+            if (params.files) {
+                $form[0].enctype = 'multipart/form-data';
+                $.each(params.files, function (key, files) {
+                    if (files instanceof FileList) {
+                        input = document.createElement('input');
+                        input.type = 'file';
+                        input.name = key;
+                        input.files = files;
+                        $form[0].appendChild(input);
+                    }
+                });
+            }
+
             if (params.data.confirmation) {
                 uiConfirm({
                     content: params.data.confirmationMessage,