How do the "Source" "Sources" "Source List" powerup differ from each other?

The new 1.6 Sources implementation seems to have created these new powerups. Could someone explain exactly what they do? Can they be edited or renamed?

Old power-up Source: It is used before 1.6. You can delete it manually if you make sure that you will never downgrade to versions below 1.6. I think RemNote Team don’t delete Source to allow data from RemNote 1.6 can work with versions below 1.6.


New power-up Sources and Source List:


Sources is child of Source List. New Sources work similar to old Source but it won’t show plain text.
Syntax of Sources is: [[Sources]]―[[Reference to source 1]][[Reference to source 2 if have more than 1 source]] | Update: You cannot update Sources manually