Date range filters not updating after AJAX filter

[cheesegrits]

In the date element filter code, we are now defaulting an empty part of a date range to "now". But in AJAX-ified filtering, the empty part of the range doesn't get filled in on the visible filter after the list is filtered.

See:

http://fabrikar.com/forums/showthread.php?p=150070#post150070

-- hugh