it would be really nice if the questlog could be sorted by street and world
Great idea for a future upgrade to the current quest log system. Maybe have a few different options for ways of auto-sorting your quests including by world, then zone. Maybe an option to sort quests by type such as gathering, hunting, and deliveries/talking to NPCs.
I agree this would be nice. For the time being, you can use the Menu Chat Bubble to find out which quests you have for a particular world/street. Click the bubble, select My Quests, and a list will appear of the streets where you currently have a quest. Select the street, then "I'm ..." to see the list of goals you currently have for that street.