Can't quit nobleNote

[hakaishi]

1. Regardless of the setting "close to tray", File->Quit and tray icon -> Quit won't quit the application.
2. When the "close to tray" setting is activated, closing the the main window will minimize all windows to tray.
3. When the "close to tray" setting is deactivated, closing the main window will only minimize the main window to tray.

OS: Kubuntu 20.04.1 QT: 5.12.8

[hakaishi]

for some unkown reason the following does not quit nobleNote

qApp->setQuitOnLastWindowClosed(true);
qApp->closeAllWindows();