Also, I noticed that sorting occurs only when you click on the text at the column header, not anywhere in the column header. Hard to notice and you may think it isn't sortable. Also doesn't show any feedback on the sort order, or which column is currently sorting

Hi,

we have fixed both of the issues you mentioned, so now you can sort by the "Show in navigation", and as for " I noticed that sorting occurs only when you click on the text at the column header, not anywhere in the column header" this is limitation of the 3rd party control that is used on that screen so at this point we can do much about it.

Thanks