RE: Please add S-tab to button-buffer-map

[Drew Adams]

> > Next-field navigation is not the default behavior of TAB in 
> > most contexts. Why should previous-field navigation be the
> > default behavior of S-TAB in all contexts (globally)?
> 
> Globally, backtab is undefined. It is only defined as previous-field 
> navigation in button-buffer-map.

Then there should be no problem. Again, I have no problem with S-TAB being
the reverse of TAB when TAB navigates forward among fields.

What I said seemed unnatural was this:

>> Perhaps it would be better to remap S-tab to backtab
>> _globally_ rather than to tab as it is now.