[Grid] Selection is not persisted on drag selection when Meta/Ctrl is clicked

[PaskalevStoyan]

I'm submitting a...

• Bug report ##Current behavior

The selection of the Grid is not persisted when we have drag selection + meta/ctrl key clicked.

Expected behavior

The selection should be persisted when drag selection + ctrl / meta key is clicked along with the drag.

Minimal steps to reproduce.

1. Open this demo in our documentation
2. Drag select a few items
3. Drag select again while holding the meta/ctrl key

Reported in TicketID: 1655718

Workaround

Open this StackBlitz demo and see the onSelectionChange function for a workaround.