Queue desktop tray show action

Desktop/src/gui/systray.cpp

@@ -24,11 +24,19 @@
 #include <QApplication>
 #include <QDesktopServices>
 #include <QMenu>
+#include <QMetaObject>
 
 using namespace Qt::Literals::StringLiterals;
 
 namespace OCC {
 
+namespace {
+    void showSettingsAfterTrayEvent()
+    {
+        auto *app = ocApp();
+        QMetaObject::invokeMethod(app, [app] { app->showSettings(); }, Qt::QueuedConnection);
+    }
+}
 
 Systray::Systray(QObject *parent)
     : QSystemTrayIcon(parent)
@@ -36,7 +44,7 @@ Systray::Systray(QObject *parent)
     connect(this, &QSystemTrayIcon::activated, this, [](QSystemTrayIcon::ActivationReason reason) {
         // Left click
         if (reason == QSystemTrayIcon::Trigger) {
-            ocApp()->showSettings();
+            showSettingsAfterTrayEvent();
         }
     });
     connect(AccountManager::instance(), &AccountManager::accountAdded, this,
@@ -143,7 +151,8 @@ void Systray::computeContextMenu()
     Q_ASSERT(!contextMenu());
     auto *menu = new QMenu(Theme::instance()->appNameGUI());
 
-    menu->addAction(Theme::instance()->applicationIcon(), tr("Show %1").arg(Theme::instance()->appNameGUI()), ocApp(), &Application::showSettings);
+    auto *showAction = menu->addAction(Theme::instance()->applicationIcon(), tr("Show %1").arg(Theme::instance()->appNameGUI()));
+    connect(showAction, &QAction::triggered, this, [] { showSettingsAfterTrayEvent(); });
     auto *pauseResume = new QAction(menu);
     auto updatePauseResumeAction = [pauseResume] {
         pauseResume->setText(FolderMan::instance()->scheduler()->isRunning() ? tr("Pause synchronizations") : tr("Resume synchronizations"));