At runtime, I'm stuffing a grid of widgets into an Fl_Scroll.
My program structure demands that the grid is generated
in column-major order, but I'd like a row-major tab order
when I'm done.

I implemented this by using insert() to add each component at its
(currently) correct position.  When the grid is large, this is
rather slow.  Performance is obviously much better if I add()
each component, then sort the Fl_Scroll's array of children
when I'm all done.  It seems to work, but I'm wondering if it's
safe to do.

TIA,
Stan