fill+stroke color for highlighted feature

[leolami]

Checklist

• [x] I've searched through the current issues to make sure this feature hasn't been requested already.

Motivation

The current higlight mode of large features does not always allow you to understand which is the inside and outside of the highlighted feature

Suggested solution

I ask you to change the highlight on the features by illuminating (in transparency) also the inside and not just the edges of the feature

Alternatives considered

No response