Add drag cursor on hover?

By default a cursor should indicate item that an item is draggable and change on drag.

This turns out to be very tricky. The states that need to be supported:

Must:

• draggble: cursor: -moz-grab; cursor: -webkit-grab; cursor: grab;
• dragged cursor: -moz-grabbing; cursor: -webkit-grabing; cursor: grabing;

Nice to have:

• copy: when item is moved into list where it can be copied, show copy cursor
• not-allowed: show not allowed cursor when moving somewhere on a sortable where the item can not be dropped.

Maybe this helps:

• https://stackoverflow.com/questions/44447210/custom-cursor-with-drag-and-drop-an-html-element-without-libraries

[joephuz]

@lukasoppermann Ill give it a shot if i have some time!

[lukasoppermann]

Hey, very neat, I think this issue should be enough as a reference. I would like this behaviour to be added as a default to the library, but of course that is a bit more complicated, as you can not rely on classes.