Renamed Portals.py to VarFunctions.py, and fixed bug where you cannot

use head or tail in a loop.

Backend/Main.py

@@ -51,7 +51,6 @@ from Locks import (
     RequirePathAccessible,
     SetLock,
 )
-from Portals import ResolvePortals
 from Preview import GetMimeType, ReadTextFile, StreamBinaryFile, TextFileTypes
 from Settings import (
     DefaultSettings,
@@ -77,6 +76,7 @@ from Users import (
     UserColourOptions,
     VerifyLogin,
 )
+from VarFunctions import ResolvePortals
 from pydantic import BaseModel