SCT Edit Series Slot List: Context menu: Set Labels to (four options)
Bug Number: n/a
Release notes (y/n): Yes
For Release Nums: 7.2

The context menu in the SCT's Edit Series Slot List (tab) now starts with 
the following submenu:

   Set Labels to
      >>  Full Slot Names
      >>  Slot Names
      >>  Slot Column Names
      >>  Slot and Column Names

These set the _selected_ slot item labels to the picked function, based on 
the corresponding slot.  See this image of that context menu submenu:

http://cadswes2.colorado.edu/~philw/2017/Sct-Lboa1p4/2017-09-20/SctSetLabelsOps.png

Note that the use case presented by the client in the feature request was an 
SCT with slot items showing the Slot Column Name (the third choice).  The 
slot names were provided as text on the higher-level divider items.

The following screenshot illustrates the effect on all four presented slots. 
(Note that it wouldn't make sense to use the "Slot Column Names" option on a 
normal single-column series slot).

http://cadswes2.colorado.edu/~philw/2017/Sct-Lboa1p4/2017-09-20/SctSetLabelsExample.png

In the process of developing these functions, I needed to define specialized 
functions, as the normal way of retrieving a Slot Column Name provides the 
Slot Name instead for series slots which don't support column labels.  That 
wasn't really coherent, relative to these new operations.  See changes to 
Sim/RoolColRef (i.e. SlotColRef).