Add retries to requests

[JaniAnttonen]

If a request fails / timeouts, add a retry logic with exponential backoff.

[muzam1l]

Should we have have const interval like 3s to fetch stakes like we do for available stakes data?

[JaniAnttonen]

Might be a bit much. Stakes don't change unless the user does something, so we just need to be sure that they're fetched correctly initially and when there's a change. Related user feedback: "The stake was not visible after it was confirmed by the snackbar. Had to refresh site after a couple of seconds?"

[JaniAnttonen]

You working on this @muzam1l or care if I take this?

[muzam1l]

You can go for it 👍.