ShapeSheet: Combine the View and Insert Sections dialogs

[gwideman]

In the ShapeSheet environment, a dialog is provided for Inserting a new section, and a different dialog is provided to View (show/hide) each section.

(Actually, show/hide each section type -- for example show/hide geometry acts simultaneously on all Geometry sections.)

The problem with this is that when a section is not visible, one never knows whether that's because there is no such section (need to use Insert dialog), or there is one but it's hidden (need to use the View dialog).  This is tedious and time consuming, not to mention confusing for unfamiliar users.

It should be possible to have a single dialog that controls both these functions -- each section type applicable to the selected sheet is listed, and there would be a button to create such a section, and a checkbox to show/hide it. So far as I can see, all the logic is there already, it's just spread across the two existing dialogs.

-- Graham

[wapperdude]

...and not to mention to those of us who have to explain what to do if a section isn't visible!  I suspect that the present approach may have saved on some initial coding by eliminating tests to see a section existed and was hidden or if you want really add a new section. 

Wapperdude