fixed a minor but annoying visibility layers problem when loading a board or enabling layers

pcbnew/dialog_layers_setup.cpp

@@ -1001,6 +1001,11 @@ void DialogLayerSetup::OnOKClick( wxCommandEvent& event )
     m_Pcb->m_BoardSettings->SetCopperLayerCount( NumberOfCopperLayers );
 
     m_Pcb->SetEnabledLayers( m_LayersMask );
+    /* Reset the layers visibility flag
+     *  Because it could creates SERIOUS mistakes for the user,
+     * if some layers are not visible after activating them ...
+     */
+    m_Pcb->SetVisibleLayers( m_LayersMask );
 
     for( int i = 0; i < NB_COPPER_LAYERS; i++ )
     {

pcbnew/files.cpp

@@ -259,6 +259,12 @@ this file again."));
     /* Rebuild the new pad list (for drc and ratsnet control ...) */
     GetBoard()->m_Status_Pcb = 0;
 
+    /* Reset the layers visibility flag when loading a new config
+     *  Because it could creates SERIOUS mistakes for the user,
+     * if some layers are not visible after loading a board...
+     */
+    GetBoard()->SetVisibleLayers( GetBoard()->GetEnabledLayers() );
+
     // Display the loaded board:
     DrawPanel->Refresh( true);
     wxSafeYield();      // Needed if we want to see the board now.

pcbnew/pcbnew_config.cpp

@@ -177,7 +177,6 @@ bool Read_Hotkey_Config( WinEDA_DrawFrame* frame, bool verbose )
 bool WinEDA_PcbFrame::Read_Config( const wxString& projectFileName )
 {
     wxFileName fn = projectFileName;
-    int      ii;
 
     if( fn.GetExt() != ProjectFileExtension )
         fn.SetExt( ProjectFileExtension );
@@ -197,8 +196,7 @@ bool WinEDA_PcbFrame::Read_Config( const wxString& projectFileName )
      *  Because it could creates SERIOUS mistakes for the user,
      * if some items are not visible after loading a board...
      */
-    for( ii = 0; ii < LAYER_COUNT; ii++ )
-        g_DesignSettings.SetLayerVisibility( ii, true );
+    g_DesignSettings.SetVisibleLayers( FULL_LAYERS );
 
     DisplayOpt.Show_Modules_Cmp = true;
     DisplayOpt.Show_Modules_Cu = true;