One test has pads of a bunch of different shapes and provokes some
errors to make sure they're caught.
The others are all past issues with the zone filler to make sure we
don't suffer any regressions. (They should all just pass with no DRC
errors.)
Calling wxDialog::EndModal() directly from inside the dialog is a
potential bug if the dialog is shown in the modeless or window modal
(quasi-modal). Use the internal button events where possible and
check for the appropriate mode before calling the correct end dialog
function.
Previously disambiguation was looking for exact matches,
but vector buses are permitted to have different ranges and
still participate in merging, so they need to be disambiguated.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/5925