User Registration Advanced Fields 1.6.10

* 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.

* Feature - Multi-Draggable URL Field.
* Feature - Bulk options add to the Select2 and Multi Select2 fields.
* Enhance - GD extension check.
* Tweak - Description added for HTML field.
* Fix - Invalid file type error while uploading from edit profile.
* Fix - Upload max file size not working.
* Fix - Proper validation for deleting self uploaded file.
* Fix - Files other than images being sent to cropping area.
* Fix - Image not being uploaded in edit profile
* Fix - Undefined index PHP notices for the Range field in the Account details of WooCommerce.
* Fix - Section title label not rendering properly on frontend as selected from field's setting option.
* Fix - Removed input mask option from Time Picker and WYSIWYG. And Added placeholder option to the Time Picker field.