Good defaults

## Description
`load_svg` should get all visual properties (not just stroke) in the final properites.

## How to
It is just a matter of defining more methods (with defaults) in the `StyleStrategy` trait and redefine them (or not) for the `Struct: StyleStrategy` that `load_svg` uses

Locate the StyleStrategy trait and the load_svg implementation that uses it. Review which visual properties currently reach the final properties, add defaults for the remaining properties in the trait, and check that the load_svg strategy provides the intended overrides. Done means all SVG visual properties are represented in the final properties.

Written by the indexing model from the issue text.