Mark some non-stroke paths as strokes

[Blipz]

I think it would be nice to declare as "pseudo-strokes" (with a class, similarly as secondary/tertiary) in the charge SVG the paths that the user expects to be strokes but actually are not, so that they could be colored as if they were.
It would be a bit tedious to check all charges, but doable (maybe most of it can be automated).

[Azgaar]

Yes, the charges are messy in terms of strokes. They should work the same even if technically there are not. Good idea.

[Blipz]

Done here: #171