JetAppointments Booking for Elementor 2.1.4

* ADD: Allow to automatically change appointemnts status by Cron;
* ADD: Allow two-way synchronization for WC Orders and appointments;
* ADD: Allow to limit allowed for appointment days range;
* FIX: Adding appointments from admin area;
* FIX: Elemenotr Popup compatibility
* FIX: Providers ans Services switch when custom template is used.

* FIX: try to create DB tables only if not exists;
* FIX: days off checking;
* FIX: correctly process float values for slots;
* FIX: prevent PHP errors;
* FIX: correctly refresh services and providers list.

* ADD: Duration step in time picker settings