Make webview options optional

Fixes #48594

src/vs/vscode.d.ts

@@ -5732,7 +5732,7 @@ declare module 'vscode' {
 		 *
 		 * @return New webview panel.
 		 */
-		export function createWebviewPanel(viewType: string, title: string, position: ViewColumn, options: WebviewPanelOptions & WebviewOptions): WebviewPanel;
+		export function createWebviewPanel(viewType: string, title: string, position: ViewColumn, options?: WebviewPanelOptions & WebviewOptions): WebviewPanel;
 
 		/**
 		 * Set a message to the status bar. This is a short hand for the more powerful

src/vs/workbench/api/node/extHostWebview.ts

@@ -201,9 +201,10 @@ export class ExtHostWebviews implements ExtHostWebviewsShape {
 		viewType: string,
 		title: string,
 		viewColumn: vscode.ViewColumn,
-		options: vscode.WebviewPanelOptions & vscode.WebviewOptions,
+		options: (vscode.WebviewPanelOptions & vscode.WebviewOptions) | undefined,
 		extensionFolderPath: string
 	): vscode.WebviewPanel {
+		options = options || {};
 		const handle = ExtHostWebviews.webviewHandlePool++ + '';
 		this._proxy.$createWebviewPanel(handle, viewType, title, typeConverters.fromViewColumn(viewColumn), options, extensionFolderPath);