Rename UserMenuButton to UserMenu for new scope

res/css/_components.scss

@@ -30,7 +30,7 @@
 @import "./structures/_ToastContainer.scss";
 @import "./structures/_TopLeftMenuButton.scss";
 @import "./structures/_UploadBar.scss";
-@import "./structures/_UserMenuButton.scss";
+@import "./structures/_UserMenu.scss";
 @import "./structures/_ViewSource.scss";
 @import "./structures/auth/_CompleteSecurity.scss";
 @import "./structures/auth/_Login.scss";

src/components/structures/LeftPanel2.tsx

@@ -24,7 +24,7 @@ import RoomList2 from "../views/rooms/RoomList2";
 import { Action } from "../../dispatcher/actions";
 import { MatrixClientPeg } from "../../MatrixClientPeg";
 import BaseAvatar from '../views/avatars/BaseAvatar';
-import UserMenuButton from "./UserMenuButton";
+import UserMenu from "./UserMenuButton";
 import RoomSearch from "./RoomSearch";
 import AccessibleButton from "../views/elements/AccessibleButton";
 import RoomBreadcrumbs2 from "../views/rooms/RoomBreadcrumbs2";
@@ -184,7 +184,7 @@ export default class LeftPanel2 extends React.Component<IProps, IState> {
         let name = <span className="mx_LeftPanel2_userName">{OwnProfileStore.instance.displayName}</span>;
         let buttons = (
             <span className="mx_LeftPanel2_headerButtons">
-                <UserMenuButton />
+                <UserMenu />
             </span>
         );
         if (this.props.isMinimized) {

src/components/structures/UserMenu.tsx

@@ -44,7 +44,7 @@ interface IState {
     isDarkTheme: boolean;
 }
 
-export default class UserMenuButton extends React.Component<IProps, IState> {
+export default class UserMenu extends React.Component<IProps, IState> {
     private dispatcherRef: string;
     private themeWatcherRef: string;
     private buttonRef: React.RefObject<HTMLButtonElement> = createRef();