Update Swedish translations

I noticed that the https://tools.wmflabs.org/xtools/pcount/index.php?uselang=sv generates errors while also missing several Swedish translations.

The translations seem to actually be present in the file I edited, so I'm not sure this will fix anything, but since I already translated/improved the translations I thought I might as well submit them.

Is there a simple way to fix the Swedish translations on the site?