message: Add confirm for contract address delete
diff: @@ -156,7 +156,15 @@ void ContractBookPage::on_deleteContractInfo_clicked()
  QModelIndexList indexes = table->selectionModel()->selectedRows();
  if(!indexes.isEmpty())
  {
  - table->model()->removeRow(indexes.at(0).row());
  + int row = indexes.at(0).row();
  + QModelIndex index = table->model()->index(row, ContractTableModel::Address);
  + QString contractAddress = table->model()->data(index).toString();
  + QString message = tr("Are you sure you want to delete the address \"%1\" from your contract address list?");
  + if(QMessageBox::Yes == QMessageBox::question(this, tr("Delete contact address"), message.arg(contractAddress),
  + QMessageBox::Yes | QMessageBox::Cancel, QMessageBox::Cancel))
  + {
  + table->model()->removeRow(row);
  + }
  }
  }
  