Metadata import breaks when german Umlauts in folder name (e.g. ö)

[merschs]

Description of the bug

When importing a folder the jpg metadata is not matched to the corresponding raw file, if there is Umlaut (e.g., ö) in the folder name.

To Reproduce

1. Go to Import
2. Select folder with Umlaut (e.g, ö)
3. Import
4. See metadata is empty (no exposure, camera brand, etc.)

Expected behavior

Just like importing from any other folder (i.e., raws having metadata)

Context

import.zip

Which commit introduced the error

Using prepackaged Windows Builds, the first broken version is this:
ansel-eb70788-win64.exe

Meaning, it is working in version:
ansel-43e4fce-win64.exe

System

Windows system

Additional context
Reproducable with all newer versions newer than the first broken version ansel-eb70788-win64.exe.

[aurelienpierre]

Very probably related to #231

[aurelienpierre]

See #231 for a workaround, this issue is with Exiv2