JetAppointments Booking for Elementor 2.1.4

* FIX: Date slots in admin panel

* ADD: Compatibility with JetFormBuilder
* FIX: Saving global settings
* FIX: Empty days of weeks in the schedule
* FIX: The price from the calculator field is transferred to the WooCommerce prices
* FIX: Fixed a bug with booking different times with the same provider

* FIX: Time slots compatibility with php 7.1