Ui improvements (#6198)

* PLT-6306 - Post alignment in compact view

* PLT-6266 - Adjusting spacing for files (compact)

* PLT-6302 - Margins not equal for paragraphs in post

* PLT-6332 - FIxing inline images

* PLT-6134 - Fixing border on emoji picker

* PLT-6323 - Fixing UI for system console user list

* PLT-6375 - Updating emoji picker

* PLT-6327 - Updating more channel/user list

* PLT-6241 - Adding IE detection

* PLT-6332- Fixing inline markdown images

webapp/components/searchable_user_list/searchable_user_list.jsx

@@ -1,7 +1,9 @@
 // Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
+import $ from 'jquery';
 import React from 'react';
+import ReactDOM from 'react-dom';
 import {FormattedMessage} from 'react-intl';
 
 import UserList from 'components/user_list.jsx';
@@ -83,12 +85,14 @@ export default class SearchableUserList extends React.Component {
         this.nextTimeoutId = setTimeout(() => this.setState({nextDisabled: false}), NEXT_BUTTON_TIMEOUT);
 
         this.props.nextPage();
+        $(ReactDOM.findDOMNode(this.refs.channelListScroll)).scrollTop(0);
     }
 
     previousPage(e) {
         e.preventDefault();
 
         this.props.previousPage();
+        $(ReactDOM.findDOMNode(this.refs.channelListScroll)).scrollTop(0);
     }
 
     focusSearchBar() {