Version 0.13.0

The prefab root becomes selectable, an autosave freezes the editor half as long, and a level card credits the music

• The root of a prefab template can be selected. Click its row in the Prefab timeline and its keyframes are edited like any other object's. Opening a placement lands on the root, and selecting it loops playback over the template's own length
• An autosave freezes the editor for half as long: 133 ms instead of 265 ms on a 12.3 MB level. It used to copy the whole level twice, once for the backup and once for the save
• The cleanup after a save no longer runs on the main thread. Deleting the stale file of the other format and rotating the backups used to run in the middle of a frame, four times per autosave
• A level card names who wrote the music, on its own line under the level's authors. Which resource is named is set by the Show on the level card tick box on that resource. A level with exactly one audio resource gets the line without ticking anything
• A timeline stops drawing a clip hidden completely behind another one on the same lane. A wider clip lies under a narrower one, and a selected or dragged clip is on top of its lane. A clip that is not drawn can still be clicked
• A timeline releases its elements as soon as it is hidden. A folded level and an unselected tab used to cost as much every frame as when they were open