List forms now save filter 'operator' when saving grid settings

When saving grid settings on the following forms, the filter 'operator' (e.g., Begins, Contains, Equals) is now saved for columns, even if that column is not currently being filtered, i.e., there is no value entered in the filter row for that column. This allows the default 'operator' to be changed, e.g., from Begins to Contains and saved with the grid:

• Account List
• Client List