When you click Refresh on a source but are no longer connected, let's…

… log you out and back in; this will ask for new credentials and then reload anyway.

Should help with #5406

lutris/gui/widgets/sidebar.py

@@ -161,6 +161,7 @@ def on_refresh_clicked(self, button):
         button.set_sensitive(False)
         if self.service.online and not self.service.is_connected():
             self.service.logout()
+            self.service.login(parent=self.get_toplevel())  # login will trigger reload if successful
             return
         self.service.start_reload(self.service_reloaded_cb)