Preserve pending settings when reopening or exiting

Reload configuration only when creating the Settings dialog.
Flush deferred changes before normal application shutdown.

Author: birdie-github

src/alertwindow.cpp

@@ -348,13 +348,11 @@ void AlertWindow::animateToContentHeight() {
 }
 
 void AlertWindow::showSettings() {
-    m_config->reloadFromDiskPreservingWindowPosition();
-
     if (!m_settingsDialog) {
+        m_config->reloadFromDiskPreservingWindowPosition();
         m_settingsDialog = new SettingsDialog(m_config, this);
         m_settingsDialog->setAttribute(Qt::WA_DeleteOnClose, true);
     }
-    m_settingsDialog->refreshFromConfig();
     m_settingsDialog->show();
     m_settingsDialog->raise();
     m_settingsDialog->activateWindow();

src/main.cpp

@@ -46,6 +46,8 @@ int main(int argc, char **argv) {
     parser.process(app);
 
     Configuration config;
+    QObject::connect(&app, &QCoreApplication::aboutToQuit,
+                     &config, &Configuration::endDeferredSave);
     ProcessMonitor monitor;
     monitor.setIntervalMs(parser.isSet(intervalOpt) ? parser.value(intervalOpt).toInt() : config.refreshInterval());
     monitor.setTreeThresholdPercent(parser.isSet(thresholdOpt) ? parser.value(thresholdOpt).toDouble() : config.treeThresholdPercent());