relayed here and copied below: https://github.com/bitcoin/bitcoin/pull/12610#issuecomment-376278677

this logic here means that anytime we do a wallet match on rpc debug console, it will not find the wallet unless it has no `.dat` extension: 3dba3c3#diff-8c9d79ba40bf702f01685008550ac100R491

This also means you can load two wallets(eg `wallet.dat` and `wallet`), and they will look the same in the drop down selector.

imo if we're supporting arbitrary filename extensions we should just display the entire name
{
    if(locked)
    {
        
        return wallet->Lock();
    }
    else
    {
        
        return wallet->Unlock(passPhrase);
    }
}
bool WalletModel::changePassphrase(const SecureString &oldPass, const SecureString &newPass)
{
    bool retval;
    {
        LOCK(wallet->cs_wallet);
        wallet->Lock(); 
        retval = wallet->ChangeWalletPassphrase(oldPass, newPass);
    }
    return retval;
}
bool WalletModel::backupWallet(const QString &filename)