To quote Yves:

"The context menu on Content panel confused me a lot. If the Grid is wrapped in e.g. an AnchorPane then the context menu has an active Delete, that applies to the selected row or column, fine, but it also has several other active items that apply to the whole grid: Select Parent, Fit to Parent, Wrap in > and all the sub-menu, Unwrap.
I find confusing to have in the same context menu some verbs that apply to the selected row / column as others apply to the row's / column's container aka the grid. The fact the context menu contains also a Grid Pane > sub-menu adds to the confusion imho."