* Gui: Prevent whole-object highlight when picked list is enabled
Removed the logic that forced `onTop=1` when `needPickedList()` is true
in View3DInventorSelection. This was causing the entire object to be
highlighted instead of just the selected sub-element when the "Picked
object list" option was enabled.
* Part: Remove `needPickedList` mat override to prevent rendering artifact
The `needPickedList` check in `SoBrepFaceSet` was triggering
unnecessary material override processing that caused face clipping
artifacts when the "Picked object list" option was enabled in Selection
View. This check has been removed as the picked list functionality works
independently of the rendering path.
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