Introduce limitations on search history storage

[mattcoxonline]

I like having my search history, but I don't want an unlimited list of search history stored forever (even if it is just on my own device).

Could we see an option to limit the search history by either a count or date?

• Delete search terms older than X days.
• Only keep the past X searches.

For instance, I'd love to keep the past 30 days of search terms. Or, if the option was based on a number, then the past 100 searches. Anything older, I'd like Simple Search to forget.