[bisq-network/bisq] Added graceful shutdown hook (#4047)

[wiz]

wiz requested changes on this pull request.

Tested the following in GUI preferences:
1) `node100.wiz.network,node130.wiz.network,node140.wiz.network,node150.wiz.network`
2) `node100.wiz.network:8333,node130.wiz.network:8333,node140.wiz.network:8333,node150.wiz.network:8333`
3) `2401:b140::42:100,2401:b140::44:130,2401:b140::44:140,2401:b140::44:150`
4) `[2401:b140::42:100]:8333,[2401:b140::44:130]:8333,[2401:b140::44:140]:8333,[2401:b140::44:150]:8333`

All passed except 2, can you fix it please



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