Support numeric columns with appropriate advanced search options

We need to be able to search for records where a numeric columns has a value greater than zero. RT-237037 . At the moment numeric is treated like text. While it's possible to search for value != '0.00' (in this case the numeric represents money and won't ever be less than zero) this appears to give an incorrect number of records - there are currently 441 such rows in the database but Hotwire returns 404. That may be a separate issue.