Editor 1 menu

• "Analysis options" menu item
• "System input" menu item
• "Berms (active side)" menu item
• "Berms (passive side)" menu item
• "Soils" menu item
• "Type of earth pressure" menu item
• "Active earth pressure" menu item
• "Passive earth pressure" menu item
• "At-rest earth pressure" menu item
• "User-defined earth pressure coefficients" menu item
• "Seismic acceleration" menu item
• "Analysis of Sum V" menu item
• "Partial factors + Sum V" menu item