better presentation of notations in glossary entries

[kohlhase]

I (mostly) like the way glossary entries in http://mathhub.info/mh/glossary But the "Show Notations" link should float to the right whereas the language buttons should stay on the left.

When clicked the Show notations should not disrupt the glossary entry (as they currently do). Maybe a pop-up or extending the entry below the text would be better?

Maybe we should talk to Andrea about this.