Add option to hide duplicate and hidden ghosts from Spread Sheet View
As mentioned here, the spread sheet view doesn't filter out duplicate or hidden ghost cells (and likely ghost points as well). It did filter them out in 5.8.1. This change of behavior is likely linked to the migration from
This can be detrimental when analyzing data directly on the spreed sheet, or when exporting, as duplicated data (duplicated ghosts), or uninitialized data (hidden ghosts) can show up in the spread sheet. An option to display or not ghost information could possibly be useful if the user really wants to check ghost data.