[QuickGrid] Reevaluate the number of rows on the last page of a Virtualized QuickGrid

[Nick-Stanton]

aspnetcore/src/Components/QuickGrid/Microsoft.AspNetCore.Components.QuickGrid/src/QuickGrid.razor.cs

Lines 335 to 340 in 42905b0

	// ARIA's rowcount is part of the UI, so it should reflect what the human user regards as the number of rows in the table,
	// not the number of physical <tr> elements. For virtualization this means what's in the entire scrollable range, not just
	// the current viewport. In the case where you're also paginating then it means what's conceptually on the current page.
	// TODO: This currently assumes we always want to expand the last page to have ItemsPerPage rows, but the experience might
	// be better if we let the last page only be as big as its number of actual rows.
	_ariaBodyRowCount = Pagination is null ? providerResult.TotalItemCount : Pagination.ItemsPerPage;

[MackinnonBuck]

Closing this out. If customers report this being an issue, we will use another issue to track addressing it.