[MM-38649] Put top bar in a BrowserView (#1758)

* [MM-38649] Tab bar as BrowserView POC

* Fixes for Mac

* Linux fixes

* Lint fix

* Make view full height

* Fix for macOS getting stuck when dragging

* Lint fix

src/main/windows/mainWindow.ts

@@ -17,7 +17,6 @@ import {DEFAULT_WINDOW_HEIGHT, DEFAULT_WINDOW_WIDTH, MINIMUM_WINDOW_HEIGHT, MINI
 
 import * as Validator from '../Validator';
 import ContextMenu from '../contextMenu';
-import {getLocalPreload, getLocalURLString} from '../utils';
 
 function saveWindowState(file: string, window: BrowserWindow) {
     const windowState: SavedWindowState = {
@@ -39,7 +38,6 @@ function isFramelessWindow() {
 
 function createMainWindow(config: CombinedConfig, options: {linuxAppIcon: string}) {
     // Create the browser window.
-    const preload = getLocalPreload('mainWindow.js');
     const boundsInfoPath = path.join(app.getPath('userData'), 'bounds-info.json');
     let savedWindowState;
     try {
@@ -55,8 +53,6 @@ function createMainWindow(config: CombinedConfig, options: {linuxAppIcon: string
 
     const {maximized: windowIsMaximized} = savedWindowState;
 
-    const spellcheck = (typeof config.useSpellChecker === 'undefined' ? true : config.useSpellChecker);
-
     const windowOptions: BrowserWindowConstructorOptions = Object.assign({}, savedWindowState, {
         title: app.name,
         fullscreenable: true,
@@ -74,8 +70,6 @@ function createMainWindow(config: CombinedConfig, options: {linuxAppIcon: string
             nodeIntegration: process.env.NODE_ENV === 'test',
             contextIsolation: process.env.NODE_ENV !== 'test',
             disableBlinkFeatures: 'Auxclick',
-            preload,
-            spellcheck,
         },
     });
 
@@ -92,24 +86,13 @@ function createMainWindow(config: CombinedConfig, options: {linuxAppIcon: string
         log.error('Tried to register second handler, skipping');
     }
 
-    const localURL = getLocalURLString('index.html');
-    mainWindow.loadURL(localURL).catch(
-        (reason) => {
-            log.error(`Main window failed to load: ${reason}`);
-        });
-    mainWindow.once('ready-to-show', () => {
-        mainWindow.webContents.zoomLevel = 0;
-
+    mainWindow.once('show', () => {
         mainWindow.show();
         if (windowIsMaximized) {
             mainWindow.maximize();
         }
     });
 
-    mainWindow.once('show', () => {
-        mainWindow.show();
-    });
-
     mainWindow.once('restore', () => {
         mainWindow.restore();
     });