This idea is another idea borrowed from programmers editors, the idea being to show a search history window that will show all matches for a specific term. If the particluar line is double-clicked then Diadem will jump to that specific file and line showing the search term. 
Hello
Thank you for your request. We understand your suggestion but given the age of this entry and the fact that just a few sponsors are supporting it, we have decided to decline this suggestion and prefer to develop more frequently requested features instead. We hope you understand this.
Greetings
Walter