gal: correct layer ordering

Net labels need to be rendered under the selected item.

Fixes: lp:1790016
* https://bugs.launchpad.net/kicad/+bug/1790016

gerbview/gerbview_draw_panel_gal.cpp

@@ -168,6 +168,8 @@ void GERBVIEW_DRAW_PANEL_GAL::SetTopLayer( int aLayer )
     // Move DCODE layer to the top
     m_view->SetTopLayer( GERBER_DCODE_LAYER( aLayer ) );
 
+    m_view->SetTopLayer( LAYER_SELECT_OVERLAY );
+
     m_view->SetTopLayer( LAYER_GP_OVERLAY );
 
     m_view->UpdateAllLayersOrder();

pcbnew/pcb_draw_panel_gal.cpp

@@ -48,8 +48,8 @@ const LAYER_NUM GAL_LAYER_ORDER[] =
 {
     LAYER_GP_OVERLAY,
     LAYER_DRC,
-    LAYER_PADS_NETNAMES, LAYER_VIAS_NETNAMES,
     LAYER_SELECT_OVERLAY,
+    LAYER_PADS_NETNAMES, LAYER_VIAS_NETNAMES,
     Dwgs_User, Cmts_User, Eco1_User, Eco2_User, Edge_Cuts,
 
     LAYER_MOD_TEXT_FR,