Remove WindowManager, separate functionality into smaller modules (#2682)

* Move sendToRenderer to respective singletons

* Move to using ViewManager call for getting view by webContentsId

* Move show and create logic to main window, handle deep linking seperately

* Move resizing logic and event handing to mainWindow

* Move server switching logic to main/app

* Move tab switching logic to main/app, rely on showById for most usage

* Migrate remaining functions, remove windowManager objects, set up imports for self-contained singletons

* Fix E2E tests

* Update src/main/app/servers.ts

Co-authored-by: Elias Nahum <nahumhbl@gmail.com>

---------

Co-authored-by: Elias Nahum <nahumhbl@gmail.com>

src/main/app/utils.ts

@@ -27,7 +27,6 @@ import {createMenu as createTrayMenu} from 'main/menus/tray';
 import {ServerInfo} from 'main/server/serverInfo';
 import {setTrayMenu} from 'main/tray/tray';
 import ViewManager from 'main/views/viewManager';
-import WindowManager from 'main/windows/windowManager';
 import MainWindow from 'main/windows/mainWindow';
 
 import {mainProtocol} from './initialize';
@@ -39,7 +38,8 @@ const log = new Logger('App.Utils');
 
 export function openDeepLink(deeplinkingUrl: string) {
     try {
-        WindowManager.showMainWindow(deeplinkingUrl);
+        MainWindow.show();
+        ViewManager.handleDeepLink(deeplinkingUrl);
     } catch (err) {
         log.error(`There was an error opening the deeplinking url: ${err}`);
     }
@@ -58,7 +58,7 @@ export function handleUpdateMenuEvent() {
     Menu.setApplicationMenu(aMenu);
     aMenu.addListener('menu-will-close', () => {
         ViewManager.focusCurrentView();
-        WindowManager.sendToRenderer(APP_MENU_WILL_CLOSE);
+        MainWindow.sendToRenderer(APP_MENU_WILL_CLOSE);
     });
 
     // set up context menu for tray icon