[BUG] Fix width of glossary right column (for longer entries)

**Which version of the template are you using?**
6.1.18

**What went wrong?**
Glossary entries with a long key originares a very narrow right column (with the value).

**Expected behavior**
More balanced columns!

**Additional context**
Maybe allow the user to break the key into multiple lines?! Or limit the maximum width of the left column.
