Improve vegetarian-only restaurants marking

[janvlug]

For this vegetarian-only restaurant, I notice the following:

• When you set the Filters to only "Vegetarian only", this restaurant is not shown.
• When you set the Filters to only "Vegetarian friendly", this restaurant is not shown.

Also, vegetarian-only restaurants (which are nearly always also vegan friendly, I assume) have the same marker as vegan friendly restaurants that also serve meat. I suggest to make a separate marker for vegetarian-only restaurants that are also vegan friendly. I suggest to use the for these restaurants the current vegetarian-only marker, but in the light green color.

Use case:

I am vegan, and I prefer to eat in vegetarian-only restaurants over restaurants that serve meat, but which are also vegan friendly. I would really like if when I select the Filters "vegan only" and "vegan friendly" that the vegetarian-only restaurants are distinguishable from the vegan friendly restaurants (that often also serve meat).

[Rudloff]

With the way the system works currently, each marker can only be in one filter, so it is added to the most restrictive filters that applies. (If not vegan only, then vegan friendly, if not then vegetarien only, etc.)
I agree this is not perfect and it would be better if markers could be in several filters.