Unable to clear the cuttof date once set

[Former user]

I've set a cuttof date, but then decided not to use it, the field won't let me delete the date even though it's marked as optional. I am force to put a date in the future.

[John Bradley]

Issue #108 was marked as a duplicate of this issue.

[Dan Driscoll]

I have found that the <backspace> key clears it.