[PQ Splitter] Creating a PQ with countries or regions with special characters does not work.

[2Abendsegler]

Describe the bug

[PQ Splitter] Creating a PQ with countries or regions with special characters does not work.

Beispiel: Region Baden-Württemberg

Fehlermeldung aus Geoclub.

To Reproduce

1. https://project-gc.com/Tools/PQSplit?multi_countryregion%5B%5D=Germany%7CBaden-W%C3%BCrttemberg&hidden_fromyyyy=2001&hidden_frommm=1&hidden_fromdd=1&hidden_toyyyy=2001&hidden_tomm=12&hidden_todd=31&submit=Filter
2. Button Create PQ(s) drücken

Expected behavior

No response

OS

Windows

Browser

Firefox

GClh Version

0.11.15

Additional context

No response

[2Abendsegler]

Merged with #2104