Comment 14 for bug 1820248

@Seth, ok, I will check next nightly.
One more thought: you should differentiate between a new track segment where its free end to be connected to some snapping point,
and a segment having been connected and dragging.
It's everything is fine at the "laying new track" case.
At the "dragging an already-placed segment" case the only object(s) to be snapped to is
- parallel segments of the same net
- grid
but definitely not the old position.