[Therion] Therion 5.3.9

Hello everybody, I have just uploaded version 5.3.9, which includes mostly bugfixes. Here is a list of them: - added missing area flowstone and moonmilk into legend - fixed xvi export of extended elevation - fixed symbol-hide/show point remark bug - fixed wall:debris bug in AUT symbol set (thanks to Georg Pacher) - fixed layout color map-bg transparent bug - LRUD area dimensions is drawn for all shots before these shots are drawn (centerline is compact when map is exported from centerline only) - vthreshold should work now for loch LRUD modelling + added option -enable/disable splay-shots to 3d model export S.