Don't dim markers when in high-contrast mode.

Fixes: lp:1706570
* https://bugs.launchpad.net/kicad/+bug/1706570

pcbnew/pcb_painter.cpp

@@ -229,6 +229,9 @@ const COLOR4D& PCB_RENDER_SETTINGS::GetColor( const VIEW_ITEM* aItem, int aLayer
         // Try to obtain the netcode for the item
         if( const BOARD_CONNECTED_ITEM* conItem = dyn_cast<const BOARD_CONNECTED_ITEM*> ( item ) )
             netCode = conItem->GetNetCode();
+
+        if( item->Type() == PCB_MARKER_T )
+            return m_layerColors[aLayer];
     }
 
     // Single net highlight mode