Problem

If the comment in an element of the glossary has two spaces, the prepare_original function breaks the originals in the translation table.

Solution

This PR avoids adding the invisible classes in the glossary, applying the glossary as the last element in the prepare_original function.

Testing Instructions

To test this PR:

1. Add an element in the glossary with two spaces in the comment.
2. Test that this breaks the original string in the translation table.
3. Test that this PR doesn't break the original string in the translation table.