User Registration Advanced Fields 1.6.8

* Feature - Hidden Field.
* Enhance - Input mask template for phone field.
* Enhance - Enabling/Disabling cropping in the profile picture field.
* Enhance - Changed checkbox and yes/no select field option to toggle.
* Tweak - Compatibility with new form builder setting design.

* Refactor - Backend validation for form data.
* Tweak - Do not initiate form submission while uploading profile picture.
* Fix - Profile picture required issue.
* Fix - Phone field validation error on smart format.
* Fix - Disable wysisyg field in form builder preview.
* Fix - Take snapshot button not appearing when file type validation set.
* Fix - Profile picture filetype validation being applied on take snapshot.

* Refactor - Profile picture upload method.
* Tweak - Server side phone field mask validation.
* Tweak - Change element tag from span to div for html field.
* Enhance - Server side validation for multi-select2 choice limit.
* Fix - Undefined index issue while updating user via admin side.