[FEATURE] Add relative referencing when binding to property keys in Perspective

This comes from this topic:

It would be super handy to be able to use relative referencing for example for SVG elements, horizontal menu items, etc. when binding to these when they’re inside of arrays.

Currently for the bindings on each array element, we have to manually set the array index.

It would be much simpler if we could replace


with this


Vote here: