I like this idea as well. I don't usually need to go back more than 10-15 lines when looking for a command while testing, but there are times that I hit the limit and am stuck with re-writing it. Increasing the limit or having an option to set the limit would be ideal. I think the option would make more people happy in that some people don't like having any history in the edit box for privacy or security reasons and it would let those people set it to 0 while those of us wanting it for testing purposes or some other reason can set it higher.
