Web url encoding in file names on Save

[CHerSun]

Describe the bug
A clear and concise description of what the bug is.

PicView Avalonia - Preview3
Opening a JPG and re-saving as avif produces wrong symbols in file name. Spaces are replaced with %20, non-latin characters are also %-encoded.

To Reproduce
Steps to reproduce the behavior:

1. Open any image, containing space, non-latin chars, etc in its name
2. Save as new image

Expected behavior
A clear and concise description of what you expected to happen.

• Same folder (wrong folder is preselected)
• Same name

Screenshots
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Additional context
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