EditGrid options

Hi Dave,

I just had a look at your recent work, and have some remarks.

- You know I'm not really a fan of popup windows (especially the modal
ones), can't we implement this in a different way?
- The sort (filter-to-come) options are not visible.
- for very large tables, it's annoying if the query is run immediately
when starting the EditGrid, without a chance to restrict it. We might
need a second menu entry to EditGrid like "View filtered data"
- Maybe we could use a wxNotebook, first tab is the data, tab text shows
filter and sort, second tab is "options"
- The button sizes on the options dlg don't conform to the latest design
guide.

Just a hint: when inheriting a dlg from dlgProperty, it will have some
handy methods for listviews available, supplying DlgUnit sizing, headers
filling the rest of the control, ...
Pixels are no legal positioning/sizing units any more.

Regards,
Andreas