If both file and its signature are in the same path, the verification feedback for both should display only the filename (without path).
If the path of the file and its signature differs, the full path should be displayed for both.

Given two files in the same path:

• test.txt
• test.txt.sig

On verification of test.txt, the path is already removed (ok):

On verification of test.txt.sig, the path is still displayed (should be fixed):

Split from T7795: Kleopatra: shorter text for verification with same name .sig file.