z-order bug fix

src/vs/workbench/api/browser/mainThreadCodeInsets.ts

@@ -36,6 +36,7 @@ class EditorWebviewZone implements IViewZone {
 		readonly webview: Webview,
 	) {
 		this.domNode = document.createElement('div');
+		this.domNode.style.zIndex = '10'; // without this, the webview is not interactive
 		this.afterLineNumber = range.startLineNumber;
 		this.afterColumn = range.startColumn;
 		this.heightInLines = range.endLineNumber - range.startLineNumber;