Feature request: support for grid-area, grid-row/column-start/end

[HaraldKi]

The CSS property grid-area is a shorthand property for grid-row-start, grid-row-end, grid-column-start, grid-column-end. Similarly grid-row and grid-column are shorthand properties for the respective pairs.

It would be great if the dependencies between the shorthand and the detail properties would be reflected in the implementation.