Aggregate by right most class name in a given selector

[romainmenke]

Repeated error aggregation 1 is almost handy for our use cases but not quite.

Considered a single result when: 1. Selector is identical except for the final selection level and 2. Success criterion and suggested technique(s) are identical

This converts main > div > picture > img in to main > div > picture > *.
This aggregates errors by common DOM parent.

Instead we would like to aggregate errors by shared selector.

For main > div > picture > .image:nth-child(1) it would aggregate by .image.

This makes it easier for developers/designers to find the components/elements that require attention.

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