Fix #5824. Prioritise 3D over 2D. Only then consider subcontexts.

It's unexpected in our 3D default viewing world to have 2D first over
3D.

src/ifcopenshell-python/ifcopenshell/util/representation.py

@@ -343,9 +343,9 @@ def get_prioritised_contexts(ifc_file: ifcopenshell.file) -> list[ifcopenshell.e
     you may want to prioritise visualising certain contexts over others,
     determined by the context type, identifier, target view, and target scale.
 
-    The default prioritises subcontexts, then contexts. It then prioritises 3D,
-    then 2D. It then prioritises bodies, then others. It also prioritises model
-    views, then plan views, then others.
+    The default prioritises 3D, then 2D. It then prioritises subcontexts, then
+    contexts. It then prioritises bodies, then others. It also prioritises
+    model views, then plan views, then others.
 
     :param ifc_file: The model containing contexts
     :return: A list of IfcGeometricRepresentationContext (or SubContext) from
@@ -383,14 +383,6 @@ def get_prioritised_contexts(ifc_file: ifcopenshell.file) -> list[ifcopenshell.e
 
     def sort_context(context):
         priority = []
-        if context.ContextType in type_priority:
-            priority.append(len(type_priority) - type_priority.index(context.ContextType))
-        else:
-            priority.append(0)
-        return tuple(priority)
-
-    def sort_subcontext(context):
-        priority = []
 
         if context.ContextType in type_priority:
             priority.append(len(type_priority) - type_priority.index(context.ContextType))
@@ -402,21 +394,16 @@ def get_prioritised_contexts(ifc_file: ifcopenshell.file) -> list[ifcopenshell.e
         else:
             priority.append(0)
 
-        if context.TargetView in target_view_priority:
+        if getattr(context, "TargetView", None) in target_view_priority:
             priority.append(len(target_view_priority) - target_view_priority.index(context.TargetView))
         else:
             priority.append(0)
 
-        priority.append(context.TargetScale or 0)  # Big then small
+        priority.append(getattr(context, "TargetScale", None) or 0)  # Big then small
 
         return tuple(priority)
 
-    # Ideally, all representations should be in a subcontext, but some BIM programs don't do this correctly
-    return sorted(ifc_file.by_type("IfcGeometricRepresentationSubContext"), key=sort_subcontext, reverse=True) + sorted(
-        ifc_file.by_type("IfcGeometricRepresentationContext", include_subtypes=False),
-        key=sort_context,
-        reverse=True,
-    )
+    return sorted(ifc_file.by_type("IfcGeometricRepresentationContext"), key=sort_context, reverse=True)
 
 
 def get_part_of_product(