"++" in Category Pattern leads to internal Server Error

[primepeter]

When ending the Pattern with "++" in catergories, an internal Server Error is thrown.

Reproduce:
Settings>AddCategory>Pattern: Notepad++ -> Error
Notepad+ -> Ok

[github-actions]

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[NeonMan5311]

Isnt "++" invalid in regex, if you want it to match NotePad++ use "NotePad++"