move getTransactionFee to OptionsModel

gui/src/sendcoinsdialog.cpp

@@ -4,6 +4,7 @@
 
 #include "addressbookdialog.h"
 #include "bitcoinaddressvalidator.h"
+#include "optionsmodel.h"
 
 #include <QApplication>
 #include <QClipboard>
@@ -86,7 +87,7 @@ void SendCoinsDialog::on_sendButton_clicked()
     case ClientModel::AmountWithFeeExceedsBalance:
         QMessageBox::warning(this, tr("Send Coins"),
             tr("Total exceeds your balance when the %1 transaction fee is included").
-                arg(QString::fromStdString(FormatMoney(model->getTransactionFee()))),
+                arg(QString::fromStdString(FormatMoney(model->getOptionsModel()->getTransactionFee()))),
             QMessageBox::Ok, QMessageBox::Ok);
         ui->payAmount->setFocus();
         break;