Add allergen choices

[mhvis]

Continuation of #283. The idea is to add a list of choices in the user profile, for the common allergens and common food preferences.

For the allergens we can use the 14 specified here (EN) and here (NL) in Annex II. For the preferences/wishes probably vegetarian, vegan, pescetarian. And a 'other' field for the exceptions.

Any input before I might implement it (if I have time)? @DutcherNL @LenaWil @Ndoll1

[Ndoll1]

Suggestion for subdevision

14 allergens
Other allergens not in list (pref. in English) --> current item

Preferences like vegetarian, vegan and I don't like X things. Same for if vegetarian/vegan plz remove for instance.

People should be urged to update list when implemented. Suggestion: first login pop-up with their current info and selection either update to new formatting or verify they have no allergens or preferences. If latter, clear fields.

[Ndoll1]

Suggestion for display
**Overview of all allergens **

All allergens noted by people who joined the list. With icons and Dutch/English name. See picture.
Then a list of other allergens in BOLD. Ideally no duplicate allergens.

---

Current list with names
With icons added for selected allergens.
Other allergens will be displayed here in BOLD
Preferences will be visible here, no special treatment font wise.

[mhvis]

Thanks. Great suggestions! This would be a good way to implement it.