Update slovenian translations, also single line cherry-pick

Nathan Leerequested to merge
nathanal/inkscape:inkscape3398_12x into 1.2.x

Slovenian (sl) po update

Taken from #3398 (closed)

Due to recent tsunami of small changes in po files both in master and 1.2 I am attaching both updated files for Slovenian (sl): update-sl.zip

Paired with !4281 (merged)

Also

Cherry pick of !4098 (merged) (cherry picked from commit ddb812ee)

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