Quite a few changes:

Quite a few changes:

1. Fix the last display bugs (I hope) by use of dialog rebuilds at stategic
   points.
2. Clean up the distributions menus so that everybody (that's reasonable)
   has All and Clear options for setting/clearing things en-masse.
3. Various attempts at display optimization.
4. Change the wording of the `Don't use Write!' dialogs to make them more
   explicitly define when and when not to use the option.