Add debug modal

[Tanya-atatakai]

1. removed displaying backup wallet, bc we can't display it's balance anyway and we have it on previous screen
2. in Figma there's a box shadow under the header when the content is scrolled - I wasn't able to add it with css only, don't think we need a solution with scroll listeners, having that we request data by intervals... but lmkyt if someone feels it's important

loading state (unlikely to be seen though, we have all data loaded at this point):

flow:

Screen.Recording.2024-05-31.at.12.20.19.mov

[oaksprout]

Looking good!

[truemiller]

🥳

[mohandast52]

LGTM, added few comments