Always include footprint edgecuts in board edge bounding box

The footprint edgecuts should always be part of the board edge bounding
box, even if the layer the footprint is on is hidden from view.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/18245

pcbnew/board.cpp

@@ -1578,9 +1578,6 @@ BOX2I BOARD::ComputeBoundingBox( bool aBoardEdgesOnly, bool aIncludeHiddenText )
     // Check footprints
     for( FOOTPRINT* footprint : m_footprints )
     {
-        if( !( footprint->GetLayerSet() & visible ).any() )
-            continue;
-
         if( aBoardEdgesOnly )
         {
             for( const BOARD_ITEM* edge : footprint->GraphicalItems() )
@@ -1589,7 +1586,7 @@ BOX2I BOARD::ComputeBoundingBox( bool aBoardEdgesOnly, bool aIncludeHiddenText )
                     bbox.Merge( edge->GetBoundingBox() );
             }
         }
-        else
+        else if( ( footprint->GetLayerSet() & visible ).any() )
         {
             bbox.Merge( footprint->GetBoundingBox( true, aIncludeHiddenText ) );
         }