Short Description: Added seletion "stats" message under Snapshot List
Bug Number: 4744, additional enhancement.
Release notes (y/n): Yes, i.e. the overall feature.
For Release Nums: 5.3

Output Config dialog for PlotPages now shows the following status message
under the Snapshots list, (for example):

  -----------------------------------------
  Available: 12 Snapshot Slots in 3 Objects
  Plotted: 8 Snapshot Slots in 2 Objects
  -----------------------------------------

This message reflects the results of the check state of all of the
Snapshot Object items in the list above the message.

SEE IMAGES: http://cadswes2.colorado.edu/~philw/2010/OutputConfig/

----------------------------
Q3GUI/OutputConfig.hpp
Q3GUI/OutputConfig.cpp
Q3GUI/OutputConfigWidgets.ui
----------------------------

New widget (in UI file):
  QLabel* _ui._snapCheckStatsLabel;

New methods:
  void updateSnapCheckStatsLabel();

-------------------
Sim/SnapShotMgr.hpp
Sim/SnapShotMgr.cpp
-------------------

Added methods:
   QList<Slot*> getAllSnapshotSlotsOfSlots (const QList<Slot*>&);

Added 'const' to various parameters.

-----------------------
Sim/cwSlotSetOutput.hpp
Sim/cwSlotSetOutput.cpp
Sim/PlotPageInfo.cpp
Sim/Slot.cpp
Sim/cwCommaDelimOutput.cpp
Sim/cwGraph.cpp
Sim/cwGraph.hpp
Sim/cwPlotter.cpp
Sim/cwPlotter.hpp
Sim/cwSingleRunOutput.cpp
Q3GUI/PlotDialog.cpp
-----------------------

Maintenance in cwOutputDevice class hierarchy.

(1) Added 'const' to various parameters.
(2) Removed unnecessary 'virtual'
(3) Changed list type:
      OLD: cwDlist<Slot*> _slots;
      NEW: QList<Slot*> _slots;

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