gear_menu: Move from TS to normal JS module.

Need to convert gear menu to popover.

tools/test-js-with-node

@@ -104,7 +104,7 @@ EXEMPT_FILES = make_set(
         "web/src/favicon.ts",
         "web/src/feedback_widget.ts",
         "web/src/flatpickr.ts",
-        "web/src/gear_menu.ts",
+        "web/src/gear_menu.js",
         "web/src/giphy.js",
         "web/src/global.d.ts",
         "web/src/hash_util.ts",

web/src/gear_menu.js

@@ -79,7 +79,7 @@ The click handler uses "[data-overlay-trigger]" as
 the selector and then calls browser_history.go_to_location.
 */
 
-export function initialize(): void {
+export function initialize() {
     const rendered_gear_menu = render_gear_menu({
         realm_name: page_params.realm_name,
         realm_url: new URL(page_params.realm_uri).hostname,
@@ -108,17 +108,17 @@ export function initialize(): void {
     $("#navbar-buttons").html(rendered_gear_menu);
 }
 
-export function open(): void {
+export function open() {
     $("#settings-dropdown").trigger("click");
     // there are invisible li tabs, which should not be clicked.
     $("#gear-menu").find("li:not(.invisible) a").eq(0).trigger("focus");
 }
 
-export function is_open(): boolean {
+export function is_open() {
     return $(".dropdown").hasClass("open");
 }
 
-export function close(): void {
+export function close() {
     if (is_open()) {
         $(".dropdown").removeClass("open");
     }

web/src/invite.ts

@@ -13,7 +13,6 @@ import * as channel from "./channel";
 import * as common from "./common";
 import {csrf_token} from "./csrf";
 import * as dialog_widget from "./dialog_widget";
-import * as gear_menu from "./gear_menu";
 import {$t, $t_html} from "./i18n";
 import {page_params} from "./page_params";
 import * as scroll_util from "./scroll_util";
@@ -276,7 +275,10 @@ function open_invite_user_modal(e: JQuery.ClickEvent<Document, undefined>): void
     e.stopPropagation();
     e.preventDefault();
 
-    gear_menu.close();
+    const $gear_menu = $("#gear-menu");
+    if ($gear_menu.hasClass("open")) {
+        $gear_menu.removeClass("open");
+    }
 
     const time_unit_choices = ["minutes", "hours", "days", "weeks"];
     const html_body = render_invite_user_modal({