[GH-1078]: added files related to loader into new folder

webapp/src/components/loading/loading.scss

@@ -0,0 +1,3 @@
+.loading-panel {
+    align-items: baseline !important;
+}

webapp/src/components/loading/loading.tsx

@@ -0,0 +1,35 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+import React, {PureComponent} from 'react';
+import './loading.scss';
+
+type Props = {
+    position?: 'absolute' | 'fixed' | 'relative' | 'static' | 'inherit';
+    style?: object;
+};
+
+export default class Loading extends PureComponent<Props> {
+    static defaultProps = {
+        position: 'relative',
+        style: {},
+    };
+
+    public render() {
+        return (
+            <div
+                className='loading-screen'
+                style={{position: this.props.position, ...this.props.style}}
+            >
+                <div className='loading__content loading-panel'>
+                    <h3>
+                        {'Loading'}
+                    </h3>
+                    <div className='round round-1'/>
+                    <div className='round round-2'/>
+                    <div className='round round-3'/>
+                </div>
+            </div>
+        );
+    }
+}

webapp/src/components/modals/channel_subscriptions/edit_channel_subscription.tsx

@@ -8,7 +8,7 @@ import ReactSelectSetting from 'components/react_select_setting';
 import ConfirmModal from 'components/confirm_modal';
 import FormButton from 'components/form_button';
 import Input from 'components/input';
-import Loading from 'components/loading';
+import Loading from 'components/loading/loading';
 import Validator from 'components/validator';
 import JiraInstanceAndProjectSelector from 'components/jira_instance_and_project_selector';
 

webapp/src/components/modals/create_issue/create_issue_form.tsx

@@ -25,7 +25,7 @@ import {getModalStyles} from 'utils/styles';
 import Validator from 'components/validator';
 import JiraFields from 'components/jira_fields';
 import FormButton from 'components/form_button';
-import Loading from 'components/loading';
+import Loading from 'components/loading/loading';
 import ReactSelectSetting from 'components/react_select_setting';
 import JiraInstanceAndProjectSelector from 'components/jira_instance_and_project_selector';