loading flatpak db in a different thread

app.py

@@ -1,4 +1,5 @@
 #!env/bin/python
+import argparse
 import sys
 
 from PyQt5.QtWidgets import QApplication, QWidget
@@ -6,9 +7,15 @@ from PyQt5.QtWidgets import QApplication, QWidget
 from core.controller import FlatpakController
 from core.model import FlatpakManager
 from view.qt.systray import TrayIcon
+from core import __version__
+
+parser = argparse.ArgumentParser(prog='fpakman', description="GUI for Flatpak applications management")
+parser.add_argument('-v', '--version', action='version', version='%(prog)s {}'.format(__version__))
+args = parser.parse_args()
 
 app = QApplication(sys.argv)
 manager = FlatpakManager()
+manager.load_database_async()
 controller = FlatpakController(manager)
 hidden_widget = QWidget()
 trayIcon = TrayIcon(parent=hidden_widget, controller=controller, check_interval=30)