originally filed by @zadjii-msft

When the GridProperties property is set to null, DevPal will display the items
as a simple list, grouping them by section. When the GridProperties property
is set to a non-null value, DevPal will display the items as a grid, with each
item in the grid being a TileSize square. Grids are useful for showing items
that are more visual in nature, like images or icons.