KPDF (The KDE PDF reader) has a feature where if you click the "Open" button
(represented by a little open folder) on the toolbar, it loads the normal "Open
File..." dialog, where you can browse directories/files to choose one to open.

But if you click and *hold* on the "Open" button, a dropdown menu appears,
containing your recently opened files, in reverse chronological order (most
recently opened first). 

I have found it to be a great usability enhancement. It saves me from having to
go to File->Recently Opened --> The File I want (it removes a step from the
process). It is very intuitive to use, and I don't see it causing any problems
for users, because it would still respond normally (opening the dialog) to the
usual action (clicking it)...

Is this possible to implement in the OO suite?