[bisq-network/bisq] Deleting SPV files should ask for confirmation (#4833)

[SteliosRammos]

### Description

When clicking that button in the Network settings the application simply shows a pop-up mentioning the files will be deleted on the next start up. The only option at that point is to shut down. Considering that it can take a long time to resync and the user might not be aware of that before clicking, it would be nice to have an option to cancel the action there.  

#### Version

Bisq 1.4.2



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