fix [#30657] New UV layers created with Mesh.uv_textures.new reset previous ones.

adding UV's from python was resetting the active UV layer but not setting the new layer to active, resetting existing UV's.

release/scripts/modules/rna_xml.py

@@ -346,7 +346,7 @@ def xml_file_run(context, filepath, rna_map):
         value = _get_context_val(context, rna_path)
 
         if value is not Ellipsis and value is not None:
-            print("  loading XML: %r" % rna_path)
+            print("  loading XML: %r -> %r" % (filepath, rna_path))
             xml2rna(xml_node, root_rna=value)