Edge.Cuts have no parent but cross all layers, so we need to handle the
"all layers" case. Also renames "IsPadOnLayer" to "IsOnLayer".
Fixes https://gitlab.com/kicad/code/kicad/issues/5351
Rather than extra splitting of the RTree that we use for collision
detection on types and direction, we limit this to checks on
layer-by-layer basis. This also allows for layer expansion by using
deque of RTrees rather than fixed index
This fixes the missing layernumbers and keeps the layers in a deque to
prevent re-allocation on expansion.
Replaces ad94b6205
Rather than extra splitting of the RTree that we use for collision
detection on types and direction, we limit this to checks on
layer-by-layer basis. This also allows for layer expansion by using
vector of RTrees rather than fixed index