Reload of grid case should also trigger reload of summary case

[magnesj]

It is possible to load a grid case (without summary case) and a summary case (without grid case). But often the two are open at the same time. If both are open, both grid case and summary should be reloaded.

If Replace Case is triggered and the corresponding case is open, ask user question if the corresponding case should be replaced also.

Make sure that the update logic work both ways.