The confusion is about World as an ID type, and the World coordinates.
Use no context for the latter, and either `BLT_I18NCONTEXT_ID_WORLD`,
or other more fine-grained contexts when needed as part of enums for the
former.
The message from the custom HDRI installation operator cannot be
disambiguated right now, because Python enums don't support contexts.
Ref T43295
Reviewed By: mont29
Maniphest Tasks: T43295
Differential Revision: https://developer.blender.org/D16194
7d7318f6c5