decouple highlighted element and pointed-at element

[mrmcplad]

Feature suggestion: At times I'd like to highlight a parent element while I point the popup at one of its children.

This would be particularly helpful for pointing to an element contained in a stacking context. You could highlight the stacking context's root element and point to a descendant element within it.

Currently, you can only point at the element you highlight and if that element is part of a stacking context, it will usually remain behind the curtain.