electron - explicitly disable spellchecker

It will be enabled by default starting with Electron 9

src/vs/code/electron-main/auth.ts

@@ -64,6 +64,7 @@ export class ProxyAuthHandler extends Disposable {
 				sandbox: true,
 				devTools: false,
 				enableRemoteModule: false,
+				spellcheck: false,
 				v8CacheOptions: 'bypassHeatCheck'
 			}
 		};

src/vs/code/electron-main/sharedProcess.ts

@@ -46,6 +46,7 @@ export class SharedProcess implements ISharedProcess {
 				nodeIntegration: true,
 				enableWebSQL: false,
 				enableRemoteModule: false,
+				spellcheck: false,
 				nativeWindowOpen: true,
 				images: false,
 				webgl: false,

src/vs/code/electron-main/window.ts

@@ -170,6 +170,7 @@ export class CodeWindow extends Disposable implements ICodeWindow {
 					nodeIntegration: true,
 					enableWebSQL: false,
 					enableRemoteModule: false,
+					spellcheck: false,
 					nativeWindowOpen: true,
 					webviewTag: true,
 					zoomFactor: zoomLevelToZoomFactor(windowConfig?.zoomLevel)

src/vs/platform/issue/electron-main/issueMainService.ts

@@ -199,6 +199,7 @@ export class IssueMainService implements ICommonIssueService {
 							nodeIntegration: true,
 							enableWebSQL: false,
 							enableRemoteModule: false,
+							spellcheck: false,
 							nativeWindowOpen: true,
 							zoomFactor: zoomLevelToZoomFactor(data.zoomLevel)
 						}
@@ -252,6 +253,7 @@ export class IssueMainService implements ICommonIssueService {
 							preload: URI.parse(require.toUrl('vs/base/parts/sandbox/electron-browser/preload.js')).fsPath,
 							enableWebSQL: false,
 							enableRemoteModule: false,
+							spellcheck: false,
 							nativeWindowOpen: true,
 							zoomFactor: zoomLevelToZoomFactor(data.zoomLevel),
 							...this.environmentService.sandbox ?

test/unit/electron/index.js

@@ -116,6 +116,7 @@ app.on('ready', () => {
 			nodeIntegration: true,
 			enableWebSQL: false,
 			enableRemoteModule: false,
+			spellcheck: false,
 			nativeWindowOpen: true,
 			webviewTag: true
 		}