Also fixes a bug where nets wouldn't get changed because the
pads weren't changed and so the pad nets would propagate and
wipe out the changed nets on the tracks.
Also includes warning dialogs that pad nets will be changed if the
track nets are.
Fixes: lp:1779854
* https://bugs.launchpad.net/kicad/+bug/1779854
Connectivity searches were slow for large, complex boards. This was
partly due to the need to search all lists for possible connections
between anchors.
We remove this requirement by creating an RTree based on items' bounding
boxes similar to the PNS router. Then we get both the colliding items
and search forward/backward to see if there are connections between the
anchors and the other item.
Because we use RTree, we no longer need the maintenance overhead of multiple
item lists and an anchor list in the connectivity class.
Fixes: lp:1701791
* https://bugs.launchpad.net/kicad/+bug/1701791
Fixes: lp:1769408
* https://bugs.launchpad.net/kicad/+bug/1769408
Fixes: lp:1761989
* https://bugs.launchpad.net/kicad/+bug/1761989
- renamed connectivity.[h|cpp] to connectivity_data [.h|.cpp] so that the file name matches the main class name.
- GetNetItems() now returns a vector instead of a list
Tomasz Wlostowski
Jeff Young
Seth Hillbrand
Camille
Mark Roszko