Feature request: Insert a row of charts, not a column of charts.

[OskarGauffin]

First of all , thanks a lot for this fantastic package, very appreciated.

In all examples I've looked at from gtExtra, the graphs are included in one column.

Some tables, common in biostatistics/epi, display a very long list of covariates, and the groups are thus by column, while each row corresponds to a variable.

Is there someway to tweak gtExtra to plot a set of graphs in a row, rather than in a column? If not, I think that would be a valuable addition.

Also, to me, the documentation was a bit confusing. The reference page says "Add plots to specific rows of an existing table" but I think it should be "add plots to specific columns". Right?

https://jthomasmock.github.io/gtExtras/reference/index.html