Adding context support in inx files is a bit complex (I already tried in the past, with no success).
The difficulty comes from the fact that the context can be added in the inx file and extracted correctly to the po file, but the extension system doesn't find the correct strings, and thus the string is not translated at all.
I'll try to investigate a bit further, but I can't promise a fix for 0.48...
Adding context support in inx files is a bit complex (I already tried in the past, with no success).
The difficulty comes from the fact that the context can be added in the inx file and extracted correctly to the po file, but the extension system doesn't find the correct strings, and thus the string is not translated at all.
I'll try to investigate a bit further, but I can't promise a fix for 0.48...