Sort settings tabs into a logical structure

Fixes https://github.com/vector-im/riot-web/issues/8864

src/components/views/settings/tabs/user/LabsUserSettingsTab.js

@@ -0,0 +1,59 @@
+/*
+Copyright 2019 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import {_t} from "../../../../../languageHandler";
+import PropTypes from "prop-types";
+import SettingsStore, {SettingLevel} from "../../../../../settings/SettingsStore";
+import LabelledToggleSwitch from "../../../elements/LabelledToggleSwitch";
+const sdk = require("../../../../..");
+
+export class LabsSettingToggle extends React.Component {
+    static propTypes = {
+        featureId: PropTypes.string.isRequired,
+    };
+
+    _onChange = async (checked) => {
+        await SettingsStore.setFeatureEnabled(this.props.featureId, checked);
+        this.forceUpdate();
+    };
+
+    render() {
+        const label = _t(SettingsStore.getDisplayName(this.props.featureId));
+        const value = SettingsStore.isFeatureEnabled(this.props.featureId);
+        return <LabelledToggleSwitch value={value} label={label} onChange={this._onChange} />;
+    }
+}
+
+export default class LabsUserSettingsTab extends React.Component {
+    constructor() {
+        super();
+    }
+
+    render() {
+        const SettingsFlag = sdk.getComponent("views.elements.SettingsFlag");
+        const flags = SettingsStore.getLabsFeatures().map(f => <LabsSettingToggle featureId={f} key={f} />);
+        return (
+            <div className="mx_SettingsTab">
+                <div className="mx_SettingsTab_heading">{_t("Labs")}</div>
+                <div className="mx_SettingsTab_section">
+                    {flags}
+                    <SettingsFlag name={"enableWidgetScreenshots"} level={SettingLevel.ACCOUNT} />
+                </div>
+            </div>
+        );
+    }
+}