[electrum] implement autocompletion when restoring from seed

Summary:
This concludes backport of electrum#4033

Depends on D17568

Test Plan:
restore a wallet from seed.
Test that a typo in a previous world or an icelandic word (Bjólfskviða) disables the autocompletion

Reviewers: #bitcoin_abc, Fabien

Reviewed By: #bitcoin_abc, Fabien

Differential Revision: https://reviews.bitcoinabc.org/D17569