case insensitive search not working with upper-case accented letters?

[xfzv]

Example:

1. Search for word - returns either word or Word matches :heavy_check_mark:
2. Search for café - only returns café matches but not CAFÉ :x:
3. Search for CAFÉ - only returns CAFÉ matches but not café :x:

[po5]

Lua issue, but probably can find code capable of handling that.

> a = "CAFÉ"
> a:lower()
cafÉ

Easiest solution would be to replace accented characters with non-accented ones.

[christoph-heinrich]

Related https://github.com/tomasklaen/uosc/discussions/656