[SES-3119] - Unread count not cleared (#887)

app/src/main/java/org/thoughtcrime/securesms/database/Storage.kt

@@ -1493,9 +1493,10 @@ open class Storage @Inject constructor(
             // this deletes all *from* thread, not deleting the actual thread
             smsDatabase.deleteMessagesFrom(threadID, fromUser.serialize())
             mmsDatabase.deleteMessagesFrom(threadID, fromUser.serialize())
+            threadDb.update(threadID, false)
         }
 
-        threadDb.update(threadID, false)
+        threadDb.setRead(threadID, true)
 
         return true
     }