The following properties can be used to customize the List Layout mode: RepeatColumns,
RepeatDirection and RowAlign
The RepeatDirection property determines the order in which the
nodes in the level are rendered.
If this property is set to RepeatDirection.Vertical, the nodes
in the level are displayed in columns loaded from top to bottom, then left to right,
until all nodes are rendered.
If this property is set to RepeatDirection.Horizontal, the nodes
in the level are displayed in rows loaded from left to right, then top to bottom,
until all nodes are rendered.
The RepeatDirection has no effect if RepeatColumns
is set to 0 (default).
The RepeatColumns property specifies the number of columns for
the given level.
Setting the RowAlign property to "true" forces the nodes in different
columns to align to each other, as if they were rendered in a table.