[request] Maintain full history and frequency of started applications

[SanskritFritz]

I usually want to use Higgins to start applications. When I first enter for example "fir" into the search box, many applications appear in alphabetical order. I choose Firefox and it gets started. So far so good. However the next time I want Firefox to appear in the list at the first place since Higgins should know from its history that it was launched before. Moreover it should be enough to type just "f" and Higgins should offer Firefox right away based on my launch history. Also if more programs were started with "f", the more frequently started applications should appear at the top in the result list. This way Higgins would adapt to my habits.