Enable Validation Form per Tab Panel in Navigation

Hello guys

I made a new feature to enable the form trigger a validation per panel before to next or previous action gets executed.

If some field required is blank, the field is highlighted as error.

This feature has a flag in admin tabs to enable or disable the JS validation.

Currently this patch only validate inputs and selects controls.

Please consider to include in the next stable release.

Enjoy IT.

enzo