Wallet API delete transaction method

[iscander01]

Please add method to wallet API to delete the transaction.

[nesbox]

API docs should be updated after release:

tx_delete

Delete existing transaction, return true if successfully canceled or error with the reason.

-->

{
	"jsonrpc":"2.0", 
	"id": 4,
	"method":"tx_delete", 
	"params":
	{
		"txId" : "a13525181c0d45b0a4c5c1a697c8a7b8"
	}
}

<--

{
	"jsonrpc":"2.0", 
	"id": 4,
	"result": true
}

[Sergei-Beam]

@nesbox Please forbid to delete transactions which have progress statuses: pending, waiting for receiver/waiting for sender, receiving/sending

[nesbox]

@nesbox Please forbid to delete transactions which have progress statuses: pending, waiting for receiver/waiting for sender, receiving/sending

fixed

[Sergei-Beam]

Checked