Graphics preferences menu

• "Refresh and zoom" menu item
• "Zoom info" menu item
• "Pen colour and width" menu item
• "Legend font selection" menu item
• "Mini-CAD toolbar" and "Header toolbar" menu items
• "Toolbar preferences" menu item
• "3D Toolbar" menu item
• "General legend" menu item
• "Materials legend" menu item
• "Constrained mod. legend" menu item
• "Reinforcement legend" menu item
• "Beam legend" menu item
• "Section legend" menu item
• "Move legends" menu item
• "Save graphics preferences" menu item
• "Load graphics preferences" menu item