Scene Manager: named LODs

{lod} in SCENE_MANAGER_LOD_COLLECTION now matches any name (COL_bob_LODhigh
as well as COL_bob_LOD0). SCENE_MANAGER_LODS (high, mid, low) sets the
button order and the LOD shown on load; unlisted LODs follow, numbers in
order, then names A-Z. It replaces SCENE_MANAGER_DEFAULT_LOD. The LOD of
Selected buttons get their own line.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

config.py

@@ -299,11 +299,13 @@ SCENE_MANAGER_LINK_MODES = {
     "*": "INSTANCE",
 }
 # Levels of detail: child collections of the asset collection, one per LOD ({asset} =
-# asset name, {lod} = LOD number). An override shows one and hides the others; a
-# collection instance instances it.
+# asset name, {lod} = LOD name, any name: COL_bob_LOD0, COL_bob_LODhigh...). An override
+# shows one and hides the others; a collection instance instances it. Keep a fixed part
+# around {lod} ("LOD"): every child collection matching the pattern counts as a LOD.
 SCENE_MANAGER_LOD_COLLECTION = "COL_{asset}_LOD{lod}"
-# LOD shown when an asset is loaded (the lowest one when missing). None: as in the file.
-SCENE_MANAGER_DEFAULT_LOD = 0
+# Order of the LOD names; the first one the file has is shown when an asset is loaded.
+# LODs not listed come after them: numbers in order (0, 1, 2...), then names A-Z.
+SCENE_MANAGER_LODS = ["high", "mid", "low"]
 # Collection gathering the loaded assets of a type, under the scene collection.
 SCENE_MANAGER_TYPE_COLLECTION = "COL_{asset_type}"
 # Default task of the assetize dialog.