Add the option to save item belongin to the same group as the anchor footprint

[lsyxiaopang]

If I want to make the layout with the silkscreen(Like some marker or comments) both be saved and restored, what should I do to also choose the silkscreen with it

[MitjaNemec]

Currently there is only the option if the silkscreen item is either contained wholly within the bounding box represented by all the footprint belonging to a sheet, or at list the item intersects the bounding box. But in the second case you have to check the "save intersecting items" checkbox.

For the items that are outside of the bounding box, the only way would be if I add an option to save also the items which belong to the same group as the anchor footprint. Similar to what the Replicate Layout group feature behaves.

But as I rarely find the time to tinker with the plugins, I'd not wait for this.