Question: Is it possible to add a default close modal feature for all custom node pop-up windows?

One WeChat user asked today if it is possible to add a default close feature for some custom node popups. The user found he can't close the pop-up modal when using the [ComfyUI-ultimate-openpose-editor](https://github.com/westNeighbor/ComfyUI-ultimate-openpose-editor).

There seems to be a page loading error with this custom node, and I can’t find how to close the modal either, unless I refresh the browser.

So is it possible to add a default close feature for custom node popup windows?

https://github.com/user-attachments/assets/3e263627-7940-442d-8719-92ebf27f50cf

https://github.com/westNeighbor/ComfyUI-ultimate-openpose-editor

1. Add a close icon to close the `comfy-modal`.
2. Support pressing the `Esc` key to close the `comfy-modal`

┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-5828-Question-Is-it-possible-to-add-a-default-close-modal-feature-for-all-custom-node-pop--27c6d73d365081f3afa6e49cf39113e8) by [Unito](https://www.unito.io)