Elevation/zIndex not working as expected

[garber34]

When passing z indices to multiple Draggable component siblings, I expect to be able to control their positions relative to each other but I don't see any noticeable effect.

If you move elevation: z, zIndex: z, from dragItemCss to positionCss that solves the problem.

[brdnvgn]

Hi! Thanks for your suggestion 🤌🏼
#143