Add the row and col tags to add release feature

components/application-mgt/org.wso2.carbon.device.application.mgt.publisher.ui/react-app/src/components/new-release/AddReleaseForm.js

@@ -17,7 +17,7 @@
  */
 
 import React from "react";
-import {Form, notification, Spin, Card} from "antd";
+import {Form, notification, Spin, Card, Row, Col} from "antd";
 import axios from "axios";
 import {withRouter} from 'react-router-dom'
 import {withConfigContext} from "../../context/ConfigContext";
@@ -126,7 +126,9 @@ class AddNewReleaseFormComponent extends React.Component {
         return (
             <div>
                 <Spin tip="Uploading..." spinning={loading}>
-                    <Card style={{ width: "65%", marginLeft: "18%" }}>
+                    <Row>
+                        <Col span={17} offset={4} >
+                            <Card>
                                 <NewAppUploadForm
                                     formConfig={formConfig}
                                     supportedOsVersions={supportedOsVersions}
@@ -134,6 +136,8 @@ class AddNewReleaseFormComponent extends React.Component {
                                     onClickBackButton={this.onClickBackButton}
                                 />
                             </Card>
+                        </Col>
+                    </Row>
                 </Spin>
             </div>
         );