Add option to ShowIndexLabels in TableList

[Former user]

The TableList currently does not display the list's index labels. Having index labels similar to the TableMatrix or the ListDrawer would greatly speed up finding the specific elements that we need check or modify.

[Dan Vicarel]

@Tor Esa Vestergaard FWIW, this issue can probably be closed. TableList does have a ShowIndexLabels property, at least in Odin 3.0.12.0.