List of hidden nets stored in project local settings
Hide/Show actions in context menu only for now, will
add them to some more GUI places soon.
Ref https://gitlab.com/kicad/code/kicad/-/issues/1951
avoid potential performance issues when the dialog is still listening to
the board updates and refreshing its data and view structures.
it seems useful to keep the settings of the dialog across dialog
open-close cycles.
Jon Evans
Oleg Endo
Seth Hillbrand
Jeff Young
Alexander