Convert imports to ES6 from CommonJS

This is needed because `require()` means something different in webpack - it ends up importing the module as something we didn't expect (and is occasionally async)

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

@@ -19,7 +19,7 @@ import {_t} from "../../../../../languageHandler";
 import PropTypes from "prop-types";
 import SettingsStore, {SettingLevel} from "../../../../../settings/SettingsStore";
 import LabelledToggleSwitch from "../../../elements/LabelledToggleSwitch";
-const sdk = require("../../../../..");
+import * as sdk from "../../../../../index";
 
 export class LabsSettingToggle extends React.Component {
     static propTypes = {