Fix modal not showing on delete issue

[d-sooter]

Delete confirmation is not showing up on newer react and nextjs version. Antd recomments using App.modal to solve that in newer versions. Tested with Storybook and React 19 plus nextjs 16

[d-sooter]

@stefan-gorules are changes like these welcome? or would we need larger general changes for react 19. there seems to be some issues and im happy to help resolve them but not sure how we can move forward. I could fork it and make the changes there we need but i would be very happy if we can give back and help improve the core. If there is anything we can do to get this moving let us know. Also things like migrating to the newer react-flow version might be interesting and i am happy to help with that .

[stefan-gorules]

Hi @d-sooter, thanks for the PR. Internally we had a discussion regarding antd and the most likely outcome is that we will be migrating over to mantine within the next 3 months. Ant Design has went through a lot of changes and it's making it more and more difficult to keep up to date with each React upgrade.

Changes like these are welcome - if you can rebase to resolve theme.tsx conflict, we can merge this one. Just giving a heads up regarding switching over to mantine. Curious to hear your thoughts as well regarding mantine. Thanks!

[d-sooter]

@stefan-gorules I like Mantine a lot its a solid library and easy to use. Let me know if you guys need help to port it once you decde to pull the trigger on it. I resolved the conflicts