Slot Viewer Review1: (1.4) Limit the automatic dialog width adjustment to 700 pixels.
Bug Number: n/a
Release notes (y/n): no
For Release Nums: 7.2

See Review1 Notes:
  http://cadswes2.colorado.edu/~philw/2017/SlotViewer/Review1/

1.4: Does it always grow when you add slots? Can we put an upper limit on 
the width? Once you've resized it and then add a new slot, it grows to fit 
the new slot.

When an automatic width is applied to the Slot Viewer dialog, that 
automatic width will not exceed the value defined by the following 
symbol in Q3GUI/SlotQtDlg.cpp:

  static const int  SLOT_VIEWER_MAX_AUTO_WIDTH (700);   // 7.2: 700

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