Show enablement/disablement status in almost all templates.

Show enablement/disablement status in almost all templates.
There is a little trickiness here: apparent recursive resolution of
@if-enabled-then@ caused the toggle template to show status out-of-phase with
the actual enablement status.  So a similar construct,
@if-enabled-display-then@, is used to resolve the status display on non-'toggle'
templates.