Handle commands in WebviewEditorOverlay correctly

Fixes #77772

src/vs/workbench/contrib/webview/browser/webviewService.ts

@@ -192,6 +192,10 @@ class DynamicWebviewEditorOverlay extends Disposable implements WebviewEditorOve
 	showFind(): void { this.withWebview(webview => webview.showFind()); }
 	hideFind(): void { this.withWebview(webview => webview.hideFind()); }
 
+	public getInnerWebview() {
+		return this._webview.value;
+	}
+
 	private withWebview(f: (webview: Webview) => void): void {
 		if (this._webview.value) {
 			f(this._webview.value);

src/vs/workbench/contrib/webview/common/webview.ts

@@ -97,6 +97,8 @@ export interface WebviewEditorOverlay extends Webview {
 
 	claim(owner: any): void;
 	release(owner: any): void;
+
+	getInnerWebview(): Webview | undefined;
 }
 
 export const webviewDeveloperCategory = nls.localize('developer', "Developer");

src/vs/workbench/contrib/webview/electron-browser/webviewCommands.ts

@@ -9,6 +9,7 @@ import { Command, ServicesAccessor } from 'vs/editor/browser/editorExtensions';
 import { WebviewEditor } from 'vs/workbench/contrib/webview/browser/webviewEditor';
 import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
 import { ElectronWebviewBasedWebview } from 'vs/workbench/contrib/webview/electron-browser/webviewElement';
+import { WebviewEditorOverlay } from 'vs/workbench/contrib/webview/common/webview';
 
 export class OpenWebviewDeveloperToolsAction extends Action {
 	static readonly ID = 'workbench.action.webview.openDeveloperTools';
@@ -92,6 +93,11 @@ function withActiveWebviewBasedWebview(accessor: ServicesAccessor, f: (webview:
 		webViewEditor.withWebview(webview => {
 			if (webview instanceof ElectronWebviewBasedWebview) {
 				f(webview);
+			} else if ((webview as WebviewEditorOverlay).getInnerWebview) {
+				const innerWebview = (webview as WebviewEditorOverlay).getInnerWebview();
+				if (innerWebview instanceof ElectronWebviewBasedWebview) {
+					f(innerWebview);
+				}
 			}
 		});
 	}