Can't dismiss the error message

[rkfg]

Steps to reproduce:

• go to https://lnurl.fiatjaf.com/
• scan lnurl-pay
• try to pay the suggested amount
• this error appears:
• the OK button doesn't dismiss the error, the Send/Scan/Receive buttons can't be accessed
• I have to restart the app to be able to use it

[akumaigorodski]

Fixed in https://github.com/btcontract/wallet/commit/a6593c38a39ee6688749843c4b337bd4b9097e66.