Near Shadings: Auto-save

An auto-save mechanism has been implemented in the shadings scene in order to prevent the loss of work if PVsyst crashes.

Here is how it works:

• one auto-save file is kept for each variant,
• it is saved every 5 minutes,
• the file is located in your current workspace Shadings folder, and is named "__auto__" followed by the current variant name,
• files are kept until you exit PVsyst after a clean run,
• files can be recovered by clicking on File -> Read scene, they are listed with other scenes.