Interface size setting: auto, large, medium or small on the world's pixel grid

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

lang/sv.lang

@@ -264,6 +264,8 @@ val.medium = Medel
 val.high = Hög
 val.normal = Normal
 val.large = Stor
+val.small = Liten
+val.auto_plain = Automatisk
 
 # ---- key binding names
 key.cam_forward = Kamera framåt