[Libreoffice] [Libreoffice-ux-advise] Suggestion and patch for "Confirmation of save format" dialog

[Astron]

Hi.

I have just found another (pretty big, I think) usability problem with
the dialogue: it doesn't have a Cancel button that would abort the
save. Pressing Esc currently selects the "Save in ODF Format" button.
To "keep the user in control" (quote from Gnome HIG again)  Josh,
would you mind thinking about also adding a "Cancel" button?

Astron.