Configuration of "grid view" to support no row/column headers

[joncison]

The grid view is great, but not everyone will require the 2D-matrix idea e.g. "Protein" + "3D structure". Some people will have just a bunch of keywords / topics - but which are still nice to render in a grid!

So I suggest to allow the grid row/column header to be optional.

In case headers would not be shown, it would be necessary to annotate (& render) each cell with an informative tag (e.g. an EDAM Topic) - as such information is no longer visible given that the row/column headers are removed.