Zone connections (even half-connections) should trigger the connected
logic in flashPads. This removes the double-standard for painting pads
and imposes thermal standoff based on the net connection to the pad if
it shares a net, not just if connected
High contrast should not show the annular rings from other layers. Once
the ring is removed, we hide the annular when not focused on a flashed
layer
Fixes https://gitlab.com/kicad/code/kicad/issues/6896
CHANGED: manually-placed (stitching) vias won't have their nets automatically updated
(unless the via is placed directly on a track segment)
CHANGED: stitching vias can be placed on footprint pads and pick up their nets
Fixes https://gitlab.com/kicad/code/kicad/-/issues/5484