deleting the last editable object in a document now causes a bogus placeholder <P>&nbsp;</P> to be added to the document.  This node has the
attribute MOZ_EDITOR_BOGUS_NODE set to TRUE.  this solves the problem of when you do a SelectAll then a DEL, you don't have a cursor
or any way to set selection in the document. You do still have the problem that the nbsp is pretty narrow and the frame containing it is hard to hit
with the mouse.  We really need the "set selection to frame nearest the mouse down point" operation.

the intent is for all inserts to look for this node, and if found delete it before the insert.  likewise, all deletes will be no-ops if this node is found.

Add atsui work for non ASCII text. Reviewed and approved by pierre. Need more work to convert more text into MacRoman.

of the special keys.
Also, handle_key_press/release_event shouldn't pass events for shift,
control, and alt keys -- other platforms don't treat those as key events,
so the XP code isn't prepared to handle them.
This fixes typing of punctuation marks in the editor.

Added the filling in of the charCode  field in nsKeyEvent

fixed memory leaks in nsRangelist.cpp.  uninitialized memory in nsTextframe, simplified APIs in nsIFrame and the underlying implementations. see layout.checkins

re-enabling this directory. if the tree breaks again, i'll yank it again, but i have built and clobber_alled and i still can't reproduce the problem.