GGU-TIME-GRAPH: Contours menu

• GGU-TIME-GRAPH: "Display" menu item
• GGU-TIME-GRAPH: Select date for contours visualisation
• GGU-TIME-GRAPH: Select type of contours
• GGU-TIME-GRAPH: "Display contours" button
• GGU-TIME-GRAPH: "Presentation format (contours)" button
• GGU-TIME-GRAPH: "Display gradients" button
• GGU-TIME-GRAPH: "Presentation format (gradients)" button
• GGU-TIME-GRAPH: "Coloured contours" button
• GGU-TIME-GRAPH: "3D contours" button
• GGU-TIME-GRAPH: "3D contours (array)" button
• GGU-TIME-GRAPH: "Automatic triangle mesh" menu item
• GGU-TIME-GRAPH: "Manually" menu item
• GGU-TIME-GRAPH: "Round off" menu item
• GGU-TIME-GRAPH: "Test" menu item
• GGU-TIME-GRAPH: "Display" menu item
• GGU-TIME-GRAPH: "Delete" menu item
• GGU-TIME-GRAPH: "Save" menu item
• GGU-TIME-GRAPH: "Load" menu item
• GGU-TIME-GRAPH: "Test coordinates" menu item
• GGU-TIME-GRAPH: "Edit coordinates" menu item
• GGU-TIME-GRAPH: "Labelling x and y axes" menu item