Skip unsupported actions and menu items

Using this to skip the toggle developer tools action since there doesn't
seem to be any way to do that from the browser. There might be others we
will need to add.

packages/vscode/src/fill/windowsService.ts

@@ -87,7 +87,7 @@ class WindowsService implements IWindowsService {
 	}
 
 	public toggleDevTools(_windowId: number): Promise<void> {
-		throw new Error("not implemented");
+		throw new Error("Toggling developer tools from JavaScript is not supported.");
 	}
 
 	public closeWorkspace(_windowId: number): Promise<void> {