Cannot disable a datepicker field manipulating $field

Hello everyone!

I was trying to disable some fields according the clean way suggested by the documentation:

function my_acf_prepare_field( $field ) {
	if( $field['value'] ) {
		$field['disabled'] = true;
	}
    return $field;
}

But I noticed that this code doesn't work (it's still possible to interact with the field) on the datepicker field (the same is true also datetime picker). I dug a bit into the code and I realized that, simply, the disabled attribute is not honored because there's not code that makes use of it.

Since it's quite trivial to solve, I'm about to submit a small pull request. :)

Have a nice day!

Start by tracing how the datepicker and datetime picker fields render their controls, using the reported disabled-field behavior as the entry point. Confirm that fields disabled through the PHP hook can no longer be interacted with for both picker types, and verify the result against any relevant project checks.