query field should not be limited to 255 chars

In the favorites table, the query field should not be limited to 255 chars, since the url may be much longer. I'm "bookmarking" search results from a view with exposed filters and the query argument is troncated when saved into favorites table. Ouch!

FYI, the HTML specification does not dictate a minimum or maximum URL length (http://tools.ietf.org/html/rfc3986#section-3.4).