Ah, you never said you'd figured that bit out
No way that I can think of to do it through the interface then.
Do you have access to the database? Or have a plugin like Moodle Adminer? If so, and with all the normal caveats about the risks, you can maybe
run a query on the 'mdl_filter_active' table. *
In that table, the 'active' field has 3 numbers:
- -9999 is DISABLED
- -1 is OFF BUT AVAILABLE
- 1 is ON
`filter` = 'glossary',
`active` = '1'
`filter` = 'glossary'
AND `contextid` = 'xxx'
AND `active` = '-1';
You'll find the value for xxx in the url when you are in the filters page of your global glossary. It will look something like yourmoodle.org/filter/manage.php?contextid=874
*Edit - no that won't work either as you'll have to set the context id for each one, and that's not easy to find You might need to have a script written to run it for you. It's probably better than editing 1000+ courses.