When this flag is checked, changing a grid field or having grid errors - then closing the grid will not pop up the 'You must undo edits' message and will gracefully close the grid.
If I have a problem I just want to test if another idea works better, if not I want to return to my original situation.
For this I would love an undo button or Ctrl + z option to undo my last actions/changes going back (step by step) to the last time I saved. Competing products deliver this option why does A5 not? It would make debugging and developing a lot easier.