Class: TEgFireGridColumn
property ClickableCursor: TCursor;The mouse cursor shown while the pointer is over the icon of one of
the column’s data cells, which can be clicked (OnCellImageClick).
The column’s title icon always uses the grid’s value.
Until it is assigned, the column follows the grid’s ClickableCursor,
and changes with it. Assigning it, even to the value it already shows,
gives the column its own value (cvClickableCursor in AssignedValues),
which the grid’s no longer changes; RestoreDefaults
makes it follow the grid again.