Update prefixes to already existing proxy

### Feature Proposal

In chartjs-plugin-annotation, we want to implement "hover" options in order to change color, size, font and so on when the annotation elements are hovered.
To do that, we need to:
1. change the prefixes to the annotation plugin options when the element is hovered.
2. apply the prefixes to sub-resolver for inner configuration nodes

### Possible Implementation

Adds to prefixes handle in the helpers.config