Qt/RPCConsole: Add signmessagewithprivkey to list of commands filtered from history

Author: luke-jr

src/qt/rpcconsole.cpp

@@ -68,6 +68,7 @@ namespace {
 // don't add private key handling cmd's to the history
 const QStringList historyFilter = QStringList()
     << "importprivkey"
+    << "signmessagewithprivkey"
     << "signrawtransaction"
     << "walletpassphrase"
     << "walletpassphrasechange"