HTML Widgets; Grids; 'small' style can now be applied at a row level

The InitialiseRow event of a widget.UI.Grid control allows certain styles to be set on rows and cells.

Previously, the "small" style could only be set on a per-cell basis. This style can now be applied to an entire row, e.g.:

// cell style
e.row.cells.AccountId.small = true;

// row style
e.row.small = true;