Disable close confirmation windows on macOS.

Author: denravonska

src/qt/optionsdialog.cpp

@@ -54,6 +54,10 @@ OptionsDialog::OptionsDialog(QWidget *parent) :
     ui->verticalLayout_Main->removeWidget(ui->gridcoinAtStartup);
     ui->verticalLayout_Main->removeWidget(ui->gridcoinAtStartupMinimised);
     ui->verticalLayout_Main->removeItem(ui->horizontalLayoutGridcoinStartup);
+
+    /* disable close confirmation on macOS */
+    ui->confirmOnClose->setChecked(false);
+    ui->confirmOnClose->setEnabled(false);
 #endif
 
     if (!QSystemTrayIcon::isSystemTrayAvailable())