disable_on_hide bugs

[pwkip]

When a field inside a group with the disable_on_hide prop is used in a condition, weird stuff happens. Needs to be fixed and create e2e tests.

ISSUE 1 : https://conditional-fields-cf7.bdwm.be/form-tester/?test-form=Github+issue+87

✅ Fixed in 2.1.1. Because a field is considered non-existing when it's disabled, the conditions with such a field make no sense. The behaviour for now is that the group will always be visible, if the condition has a non-existing field.

[pwkip]

Additional disable_on_hide bug: when a repeater is inside a group with disable_on_hide, the new sub-repeaters will be disabled. When you hide the group and then show it again, all fields become enabled again.

ISSUE 3 : https://conditional-fields-cf7.bdwm.be/form-tester/?test-form=Github+issue+87+%283%29

✅ Fixed in 2.1.1

[pwkip]

One more issue: it's possible to submit empty required fields when the parent group has the disable_on_hide property.
ISSUE 2 : https://conditional-fields-cf7.bdwm.be/form-tester/?test-form=Github+issue+87+%282%29

✅ Fixed in 2.1.1

[pwkip]

It's possible to move to next step when the parent group has the disable_on_hide property.

ISSUE 4: https://conditional-fields-cf7.bdwm.be/form-tester/?test-form=Github+issue+87+%284%29

✅ Fixed in 2.1.3