fix: transaction listing from multiple backends

[fmorency]

Refactor useTransactionsList and fix history pagination when using multiple backends.

This is not an idiomatic way of doing this kind of task but this is what we have for the moment...

Relates https://github.com/liftedinit/many-rs/issues/404

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[fmorency]

@stanleyjones I'm curious to know if you have any suggestions for improving this horror.