pcb_calculator: expand treebook at start to show the full list of pages.

pcb_calculator/pcb_calculator_frame.cpp

@@ -2,7 +2,7 @@
  * This program source code file is part of KICAD, a free EDA CAD application.
  *
  * Copyright (C) 1992-2015 jean-pierre.charras
- * Copyright (C) 1992-2021 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 1992-2022 KiCad Developers, see AUTHORS.txt for contributors.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -130,6 +130,10 @@ PCB_CALCULATOR_FRAME::PCB_CALCULATOR_FRAME( KIWAY* aKiway, wxWindow* aParent ) :
     if( m_framePos == wxDefaultPosition )
         Centre();
 
+    // Expand treebook to show all options:
+    for( size_t pageId = 0; pageId < m_treebook->GetPageCount(); pageId++ )
+        m_treebook->ExpandNode( pageId );
+
     // Connect Events
     Bind( wxEVT_CLOSE_WINDOW, wxCloseEventHandler( PCB_CALCULATOR_FRAME::OnClosePcbCalc ), this );
     Bind( wxEVT_UPDATE_UI,    wxUpdateUIEventHandler( PCB_CALCULATOR_FRAME::OnUpdateUI ),  this );