Triangular foundations menu

• General notes on triangular foundations
• "Default values" menu item
• "Define nodes" menu item
• "Edit nodes (via table)" menu item
• "Move nodes" menu item
• "Edit nodes (individually)" menu item
• "Modify values" menu item
• "Assign values in section" menu item
• "Generate nodes in array" menu item
• "Values for all foundations" menu item
• "Manual mesh" menu item
• "Automatic" menu item
• "Delete nodes and mesh" menu item
• "Refine individual elements" menu item
• "Refine elements in section" menu item
• "Refine all elements" menu item
• "Results" menu item
• "Check foundations" menu item
• "Contours" menu item
• "Test mesh" menu item
• "Generate foundations" menu item