Fix: Periodic slots are not repeated in graphs [5495] (3)
Bug Number: 5495
Release notes (y/n): Yes
For Release Nums: 6.5

Gnats 5495: Periodic slots are not repeated in graphs.

We have decided to remove the "Specified Time Range" option from the 
Periodic Slot Curve configuration.  In the revised implementation 
(prior commit), that had been used only to contribute to the computed 
"Auto-Scale" range.  But we have decided that that is not a desirable 
feature.

Periodic Slots are now supported in plots as follows:

 (1) Periodic Slot curves always fill the plot's time range.
 (2) Periodic Slots don't contribute to the Auto-Scale time range. 
      (Only Series Slots do).
 (3) If the plot contains only Periodic Slots, the Auto-Scale time 
      range is the Run Controller's time range.

The "Time Range" portion of the Periodic Slot Curve's configuration dialog 
has been removed. See this image:
  http://cadswes2.colorado.edu/~philw/2014/bugs/5495/Ref3B.png

The following record (example) has been removed fro Periodic Slot Curves 
configuration's serialization (in model files and Plot Page export files):
"$curve" periodicDates {01-01-2009 00:00:00} {01-01-2010 00:00:00} 0

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