Ultimate Member - Social Login 2.5.6

* Fixed: Cache & Session compatibility issue
* Fixed: Elementor compatibility issue
* Fixed: Duplicate overlay calls

* Fixed: Incompatibility issue with WooCommerce and Eventribe

* Fixed: A conflict with WooCommerce Ajax
* Fixed: Global redirection and compability with varnish cache
* Fixed: Redirection issues for Login/Register and custom shortcode
* Tweak: WordPress 5.6 compatibility (fixed issue with deprecated .load() function in JS)