message: [Trivial] Rewording of Custom Fee dialog text
  Assuming it is not possible to put so low Custom Fee that transaction would not get included in blockchain, rewording to transaction speed relatedness makes more sense.
diff: @@ -23,7 +23,7 @@ SendCustomFeeDialog::SendCustomFeeDialog(QWidget *parent) :
  // Text
  ui->labelTitle->setText(tr("Customize Fee"));
  - ui->labelMessage->setText(tr("Customize the transaction fee, depending on the fee value your transaction will be included or not in the blockchain."));
  + ui->labelMessage->setText(tr("Customize the transaction fee, depending on the fee value your transaction might be included faster in the blockchain."));
  setCssProperty(ui->labelTitle, "text-title-dialog");
  setCssProperty(ui->labelMessage, "text-main-grey");
  