KN4CK3R 56ab5ec9ea

Use filename as id/class prefix. (#16997) (#17000) ...

Currently the svg minifier (`make svg`) rewrites all `id` and `class` attributes in svg files. Every file gets the ids `a, b, ...`. If multiple svgs with ids are used on a page these ids are conflicting and the results are broken images.

| minified ids | unique ids |
| - | - |
| ![grafik](https://user-images.githubusercontent.com/1666336/132579375-59d3996f-c4e5-43b8-8c8d-82280c90d9e3.png) | ![grafik](https://user-images.githubusercontent.com/1666336/132579413-05bf9285-4e3b-4d0d-8f95-90b212405b05.png) |

This PR adds a prefix (the filename) to every id/class.

Follow up problem: Because we embed svg images there are duplicated ids if one svg image is used multiple times on a page. As those ids refer to the same content it may be no real problem because browser handle that fine.

2021-09-09 10:47:28 +01:00

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