Horrible File menu

[Juri Linkov <juri@linkov.net>]

Recent development turned the nicely designed File menu into an eyesore.
The already overly long menu was extended further with two more useless items.
So by default, even when you don't use frames, these items take much space
on the File menu:

  (disabled) Delete frame
  (disabled) Undelete frame
  [X] Allow Undeleting Frames

where the last item with the checkbox looks very ugly.

These useless items are pushing off-screen other useful items
that are below them such as the Quit item and the Print submenu
with Print items that were originally on the File menu but were
moved to the submenu from the overgrowing menu.

I don't understand what obstacle prevents from making this menu
more user-friendly?  Why not to show the Undelete frame item only
when at least one frame was deleted?  And why require enabling
this feature before the deleted frame can be undeleted?  Are a few
kilobytes of memory used by the deleted frame data a real concern?