Self-updates and program list from the repo

Manifests.py

@@ -11,7 +11,7 @@ from typing import Optional
 import tomlkit
 
 from Core import (
-    CacheHome, ConfigHome, CurrentDesktop, DataHome, Home, LoadConfig, ManifestsDir, ProgramsDir,
+    CacheHome, ConfigHome, CurrentDesktop, DataHome, Home, LoadConfig, ProgramsDir,
     SharedConfigDir,
 )
 
@@ -230,14 +230,22 @@ def LoadProgram(Folder: Path) -> Program:
     )
 
 
+def _LoadFrom(Folder: Path) -> list[Program]:
+    return [LoadProgram(Child) for Child in sorted(Folder.iterdir()) if (Child / "Manifest.toml").exists()]
+
+
 def LoadPrograms() -> list[Program]:
     """Alphabetical, with each program's children (Parent = its Name) right
-    after it. A child whose parent isn't there keeps its own place."""
-    Loaded = [
-        LoadProgram(Folder)
-        for Folder in sorted(ManifestsDir.iterdir())
-        if (Folder / "Manifest.toml").exists()
-    ]
+    after it. A child whose parent isn't there keeps its own place.
+    Read from the catalog fetched from the SaraSuite repo (Catalog.py) when
+    there is one, falling back to the bundled copy if that can't be loaded
+    (e.g. it uses a manifest feature this SaraSuite doesn't know yet)."""
+    from Catalog import BundledManifestsDir, ManifestsDir
+
+    try:
+        Loaded = _LoadFrom(ManifestsDir())
+    except Exception:
+        Loaded = _LoadFrom(BundledManifestsDir)
     Names = {Current.Name for Current in Loaded}
     Ordered = []
     for Current in Loaded: