JetEngine For Elementor 3.6.8

* FIX: prevent PHP error in the forms;
* FIX: missing dynamic BG properties for a elements inside a listings.

* FIX: Elementor 2.9 compatibility;
* FIX: prevent PHP error on archive templates;
* FIX: add User URL to allowed user fields;
* FIX: minor fixes.

* UPD: Show form when preset is configured but no source was found;
* FIX: Some issues related to nested listings;
* FIX: Required value for wysiwyg field;
* FIX: JetPopup compatibility;
* FIX: Profile menu on mobile devices;
* FIX: Dynamic bg for listing items.