The disable function does not recursively disable descendant forms

[cimmanon]

While I was poking around with the disable function to see if I could repurpose it to work with Views in order to address https://github.com/jaspervdj/digestive-functors/issues/63, I learned three things:

• It doesn't work on lists at all
• It only disables fields that are immediate descendants of the form (which explains the previous point)
• Disabling only works if the field is referenced in a specific way

If you have a form that looks like this:

form
	subView1 (disabled)
		field1
		subView2
			field2
			field3

This template disables field1:

<dfForm>
	<dfSubView ref="subView1">
		<dfInputText ref="field1" />
	</dfSubView>
</dfForm>

This template does not disable field1:

<dfForm>
	<dfInputText ref="subView1.field1" />
</dfForm>

The only way to disable field2 and field3 is to also disable subView2. I don't know if this is intended or not, but it's not how I expected it to work.