Respect is_required and is_disabled in Field controls.

[AlexSkrypnyk]

Control is an actual HTML form element or multiple elements that represent the "core" part of the Field.

Field template handles passing own props to controls if the controls do not already have them.

But for is_required and is_disabled this does not happen. This leads to inability to create complex fields with multiple controls passed to the Field.

This fixes the Field control element not respecting existing is_required and is_disabled that exist on control.

[AlexSkrypnyk]

The fact that this is missing is an oversight when i was implementing it originally

[richardgaunt]

Thanks @AlexSkrypnyk looks good to me.