Request: Expose table visiblity variables

[JackJ30]

I'm writing my own selection system for the table, and it would be really useful to have table visibleRows and visibleColumnIndices exposed.

Thank you

[rivo]

Can I ask what your own "selection system" does that is currently not supported by tview?

[JackJ30]

I wanted to control the selection highlight for stuff like box selections and keeping a highlight of the row or column when using the opposite selection mode. Also I wanted the table to scroll before the very bottom of the table was selected.