I am trying to use the ActionStrip within a pretty basic grid and have an issue with refreshing the grid.

The annoying one is not being able to intercept and confirm a cancel before the deletion is done.  I am handling that by storing a copy of the grid data, and then once the default actioinstrip delete is done, asking for a confirmation and if the user selects cancel, copying the copied data back into the variable used by the grid.

let confirm = window.confirm("This will delete this Emial Signature, confirm?");
if(confirm) { . . .} else {this.data = this.tempData;}

But the grid is not showing the record, even though the this.data variable is showing the proper data when examined while running.
Is there a way to force the grid to refresh?  this.grid.refreshgridState() without arguments and this.grid.reflow() do nothing for me.