Map marks.

Dear SE,

It would be great if you implement possibility to put a marks on the map with description.
It would be invaluable especially for botanists and miners like me, because as all pro gatherers know, that 3 of all spots in zone are fixed and doesn't change it's position too often.
Having possibility to mark their positions on the map it would be very helpful to find them.
If it isn't much of a problem, please make it appear also on mini-map with an arrow pointing to the nearest one.

Thank you in andvence.
GJ.