Tkinter: ability to delete widgets from Text and then re-add them

[nholtz]

I now see that I can accomplish what I want using the Canvas widget,
instead of the
Text widget (I.e., I can create a window on it, delete the window, then
re add it without
recreating the underlying widget object).

As I don't want the raw contents user-editable, I guess its better to
use a Canvas, rather
than a Text (slightly harder to use, though, I guess)

neal