Elementor Pro 3.21.1

* Tweak: Custom font title placeholder is not `enter font family`
* Tweak: Custom font title set as required
* Fix: Custom font, `font-face` enqueued only once if used in global ([#3513](Custom fonts - @font-face added many times? · Issue #3513 · pojome/elementor · GitHub))
* Fix: Added workaround for upload validation which relies on a PHP extension (fileinfo) with inconsistent reporting behavior

* New: Added custom fonts manager for self hosted fonts ([#852](Use a custom font in texts · Issue #852 · pojome/elementor · GitHub))
* New: Integration with Adobe TypeKit fonts ([#631](Typekit Support · Issue #631 · pojome/elementor · GitHub))
* Tweak: Clear menu from Nav Menu widget on template export
* Tweak: Allow zero for GetResponse integration as day of cycle

* Fix: Global widget content that got effected by previous update