GGU-AXPILE: "Fill colours" menu item

In addition to hatching the allowable area in the pile diagram (see menu item "Output preferences/Pile diagram") it can also be given a background colour. Click the "Diagram with colour" check box. The default colour is light grey. You can use any colour by means of the "Edit colour" button. The colour of the pile in the system representation can be edited by means of the "Edit pile colour" button.