Add a bolding option (icon) to the Column and Row headers (in Format options)

[Paulx99]

I’d like to see a bolding option (icon) added to the Column and Row headers (in the Format options in the Visualisations panel). Without a bolding option, (depending on the colour used for conditional formatting when available), column and row headers on tables and matrix's in particular could disappear. Right now, they just don't stand out compared to the data displayed on a table or matrix. I think they need to.