Deskbar String additions

[Raphael Slinckx <raphael slinckx net>]

Hi !

I have some strings that would be nice to add to deskbar:
 * Tooltip over the icon in the search entry reading:
	'Show previous actions'
 * Tooltip over the two buttons in the button mode:
	"Show the search entry"
	"Show previous actions"
 * String when there are no previous actions in the dropdown:
	"No history"

Are these changes allowed (some of them slipped in CVS already but are
not in POTFILES.in yet) ? If not i shall back them up ASAP..

Thanks, and sorry for the problems..
Raf