Nextmeeting

- Flatpak packaging fix

- Flatpak packaging fix

- Add auto_open_minutes to let the event automatically open a number of minutes before it starts.

- Make skip_all_day true by default castrojo

- Update flatpak dependencies, gnome platform 43
- Fix webex url regexp FynnMazurkiewicz

- We now have a wonderful window showing up when no meeting url is found to show all url attached in the description so user can click on it. (contributed by FynnMazurkiewicz)