[BOR Truckee LBAO 1.2] Sum Flows to Volume [1]
Bug Number: n/a
Release notes (y/n): No (not yet)
For Release Nums: 7.2

This is an initial implementation for the Open SeriesSlot Dialog (and related 
SlotQtDlg-based series displays, including the Edit Account dialog).  This 
needs more testing.

IN FACT: There is a problem in the Edit Account Dialog, with the Gain Loss 
slot (It's primary units are Volume, alt units are Flow -- the reverse of 
other Account Series Slots).  My added code needs an "Alt Units" nuance.
And also more GUI updating when switching that dialog between Flow and Volume.

See screenshots:

  http://cadswes2.colorado.edu/~philw/2017/SelStats/2017-10-27/SlotViewer1-Flow.png
  http://cadswes2.colorado.edu/~philw/2017/SelStats/2017-10-27/SlotViewer2-Energy.png
  http://cadswes2.colorado.edu/~philw/2017/SelStats/2017-10-27/SlotViewer3-MultUnitTypes.png

Also still to do are the Unit changes for the SCT's stats. [i.e. refer to 
Unit Scheme for integrated units].

The functionality is supported for ALL RATE units.  The integrated sum is 
shown.  This includes:

  (1) Flow ... to Volume
  (2) Power ... to Energy
  (3) Velocity ... to Length

See analysis document:

  Analysis: BOR Truckee LBAO 1.2: Sum Flows to Volume
  http://cadswes2.colorado.edu/~philw/2017/SelStats/BorLbao1p2-SumFlows-Analysis.html

See new fields in struct SlotQDlgSelectionStats (in Q3GUI/SlotQDlgSelection.hpp)

  // Integrated Sum Support (for Rate Units) [RW 7.2]
  bool _computeIntegralSum;
  unit_type _integratedUnitType;
  int _stdUnitPerTimeSecs;
  int _numIntegratedVals;
  double _integratedStdSum;

This initial work is on the Lbao1p2-SumFlowsToVol1 Git branch.

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