better workaround for #39510

src/vs/workbench/common/actions.ts

@@ -60,10 +60,17 @@ Registry.add(Extensions.WorkbenchActions, new class implements IWorkbenchActionR
 		// https://github.com/Microsoft/vscode/blob/master/src/vs/workbench/parts/search/electron-browser/search.contribution.ts#L266
 		if (descriptor.label) {
 
+			let idx = alias.indexOf(': ');
+			let categoryOriginal;
+			if (idx > 0) {
+				categoryOriginal = alias.substr(0, idx);
+				alias = alias.substr(idx + 2);
+			}
+
 			const command = {
 				id: descriptor.id,
 				title: { value: descriptor.label, original: alias },
-				category
+				category: category && { value: category, original: categoryOriginal }
 			};
 
 			MenuRegistry.addCommand(command);