I would like the Manage Grids dialog to show the quantity, similar to the Field Editor "# items" and the Item Editor "Nb" column.

My use case is using the Manage Grids dialog as an ad-hoc grid navigator: I sort by name, shift select and pick all the grids starting with A, right click>view grid, then navigate the open grid tabs.

It would be nice to know if I have a large number of items in a certain grid before doing this.