Fix new template issues on production, with partner banners and course categorie commas

Ghost User
2018-11-05T20:14:22+01:00

Closes #730, #736

- No space after comma in course list
- No inline style for partner banners
- Fix context preprocessors on production
- Fix visible 'None' value in grid item
- Change event listview to 1 week with empty state alert
- Documents page: dropdown for GM's now opens 1 by 1 instead of all
- Vacancies page can now have companies without logo instead of a crash
- CSRF in language change now working
- Fix order of years on course page