If you draw a via, wire or net, rename it to some netname, a ratsnest of
this net gets started. This also triggers a fill polygon process. Since
my gnd polygons are pretty large and slow to fill, this is causing some
waiting.
This reaction differs from when you copy a gnd wire or via, or even
finnish a "wire 'gnd'", making it all a bit unconsistant behaviour.
The ratsnest function is fair enough, but I'd like to avoid the polygon
filling. And maybe add the ratsnest when copying or in other ways adding
items belonging to the net.