[Req] : add "save search profiles"

… for the searchs you run regularly.

, and the date of the latest match should be associated with the search
=> tell if there are new results

, and add a “only if there are new results” checkbox to the saved search
=> if there ARE NO new matches, nothing is displayed.
=> if there ARE new matches, all the matches are displayed, but the user
can hide the old ones easily.