PLT-2257 Reorganized System Console (#3003)

* Reorganized system console

* Fixed the names of some components

* Fixed timestamp for BrandImageSetting

* Fixed merge issues

* Updated push notification settings to match master branch

* Removed top level setting pages and moved enable Gitlab/LDAP settings onto their respective pages

* Re-added restrictDirectMessage setting to system console

* Re-added email connection test and fixed some margins

* Fixed ESLint errors

* Renamed Authentication > Onboarding to Authentication > Email in the system console

* Renamed Customization > Whitelabeling to Customization > Custom Branding in System Console

* Re-added EnableOpenServer to system console

webapp/components/admin_console/generated_setting.jsx

@@ -0,0 +1,97 @@
+// Copyright (c) 2016 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import React from 'react';
+
+import crypto from 'crypto';
+
+import {FormattedMessage} from 'react-intl';
+
+export default class GeneratedSetting extends React.Component {
+    static get propTypes() {
+        return {
+            id: React.PropTypes.string.isRequired,
+            label: React.PropTypes.node.isRequired,
+            placeholder: React.PropTypes.string,
+            value: React.PropTypes.string.isRequired,
+            onChange: React.PropTypes.func.isRequired,
+            disabled: React.PropTypes.bool.isRequired,
+            disabledText: React.PropTypes.node,
+            helpText: React.PropTypes.node.isRequired,
+            regenerateText: React.PropTypes.node
+        };
+    }
+
+    static get defaultProps() {
+        return {
+            disabled: false,
+            regenerateText: (
+                <FormattedMessage
+                    id='admin.email.regenerate'
+                    defaultMessage='Re-Generate'
+                />
+            )
+        };
+    }
+
+    constructor(props) {
+        super(props);
+
+        this.handleChange = this.handleChange.bind(this);
+        this.regenerate = this.regenerate.bind(this);
+    }
+
+    handleChange(e) {
+        this.props.onChange(this.props.id, e.target.value === 'true');
+    }
+
+    regenerate(e) {
+        e.preventDefault();
+
+        this.props.onChange(this.props.id, crypto.randomBytes(256).toString('base64').substring(0, 32));
+    }
+
+    render() {
+        let disabledText = null;
+        if (this.props.disabled && this.props.disabledText) {
+            disabledText = (
+                <div className='admin-console__disabled-text'>
+                    {this.props.disabledText}
+                </div>
+            );
+        }
+
+        return (
+            <div className='form-group'>
+                <label
+                    className='control-label col-sm-4'
+                    htmlFor={this.props.id}
+                >
+                    {this.props.label}
+                </label>
+                <div className='col-sm-8'>
+                    <input
+                        type='text'
+                        className='form-control'
+                        id={this.props.id}
+                        placeholder={this.props.placeholder}
+                        value={this.props.value}
+                        onChange={this.handleChange}
+                        disabled={this.props.disabled}
+                    />
+                    {disabledText}
+                    <div className='help-text'>
+                        {this.props.helpText}
+                    </div>
+                    <button
+                        className='btn btn-default'
+                        onClick={this.regenerate}
+                        disabled={this.props.disabled}
+                    >
+                        {this.props.regenerateText}
+                    </button>
+                </div>
+            </div>
+        );
+    }
+}