Added 2 entries

As per https://github.com/DandelionSprout/adfilt/issues/67.

NorwegianList.txt

@@ -1,4 +1,4 @@
-! Version: 26May2020v1
+! Version: 27May2020v1
 ! Title: 🏔️ Dandelion Sprouts nordiske filtre for ryddigere nettsider
 ! Translated title: Dandelion Sprout's Nordic filters for tidier websites
 ! Expires: 12 hours
@@ -900,6 +900,10 @@ krom.is#@#.share-container
 ! ——— Caused by «RU AdList» (Should be submitted to RU AdList itself at some point) ———
 ! Makes E-newspaper previews show up properly
 @@/teasers/*$domain=agderposten.no
+! ——— Unknown cause ———
+! https://github.com/DandelionSprout/adfilt/issues/67
+@@||fe.adstate.net/assets/common/img/web_ad^$domain=ba.no|nidaros.no
+@@||fe.adstate.net/stream_file.php?type=ad_preview_image$domain=ba.no|nidaros.no
 
 ! 🇳🇴/🇩🇰: ——— Anti-anti-reklameblokkering ———
 ! 🇮🇸: ——— And-and-auglýsingshindrun ———