Revise behavior of initializing checkboxes

The checkboxes initial value should not depend on parent state and
should be restored anyway.

src/gui/optionsdialog.cpp

@@ -675,10 +675,10 @@ void OptionsDialog::saveOptions()
     pref->setHideZeroValues(m_ui->checkHideZero->isChecked());
     pref->setHideZeroComboValues(m_ui->comboHideZero->currentIndex());
 #ifndef Q_OS_MACOS
-    pref->setSystemTrayEnabled(systemTrayEnabled());
+    pref->setSystemTrayEnabled(m_ui->checkShowSystray->isChecked());
     pref->setTrayIconStyle(TrayIcon::Style(m_ui->comboTrayIcon->currentIndex()));
-    pref->setCloseToTray(closeToTray());
+    pref->setCloseToTray(m_ui->checkCloseToSystray->isChecked());
-    pref->setMinimizeToTray(minimizeToTray());
+    pref->setMinimizeToTray(m_ui->checkMinimizeToSysTray->isChecked());
 #endif
     pref->setStartMinimized(startMinimized());
     pref->setSplashScreenDisabled(isSplashScreenDisabled());
@@ -935,12 +935,9 @@ void OptionsDialog::loadOptions()
 
 #ifndef Q_OS_MACOS
     m_ui->checkShowSystray->setChecked(pref->systemTrayEnabled());
-    if (m_ui->checkShowSystray->isChecked())
-    {
     m_ui->checkMinimizeToSysTray->setChecked(pref->minimizeToTray());
     m_ui->checkCloseToSystray->setChecked(pref->closeToTray());
     m_ui->comboTrayIcon->setCurrentIndex(static_cast<int>(pref->trayIconStyle()));
-    }
 #endif
 
     m_ui->checkPreventFromSuspendWhenDownloading->setChecked(pref->preventFromSuspendWhenDownloading());
@@ -1354,27 +1351,6 @@ bool OptionsDialog::startMinimized() const
     return m_ui->checkStartMinimized->isChecked();
 }
 
-#ifndef Q_OS_MACOS
-bool OptionsDialog::systemTrayEnabled() const
-{
-    return QSystemTrayIcon::isSystemTrayAvailable()
-        ? m_ui->checkShowSystray->isChecked()
-        : false;
-}
-
-bool OptionsDialog::minimizeToTray() const
-{
-    if (!m_ui->checkShowSystray->isChecked()) return false;
-    return m_ui->checkMinimizeToSysTray->isChecked();
-}
-
-bool OptionsDialog::closeToTray() const
-{
-    if (!m_ui->checkShowSystray->isChecked()) return false;
-    return m_ui->checkCloseToSystray->isChecked();
-}
-#endif // Q_OS_MACOS
-
 // Return Share ratio
 qreal OptionsDialog::getMaxRatio() const
 {

src/gui/optionsdialog.h

@@ -123,11 +123,6 @@ private:
     void initializeLanguageCombo();
     // General options
     QString getLocale() const;
-#ifndef Q_OS_MACOS
-    bool systemTrayEnabled() const;
-    bool minimizeToTray() const;
-    bool closeToTray() const;
-#endif
     bool startMinimized() const;
     bool isSplashScreenDisabled() const;
 #ifdef Q_OS_WIN