Search option for the MultiSelectField

[matthijs]

This seems a duplicate of an existing feature request:

Autocomplete in een multi select field

When a multiselect field is very long, it can be difficult to find the right items. Thats why some form of autocomplete can help.For instance showing that items starting with ‘A’ when you type ‘A’

You have very nicely written out your usecase, can you add this to the other feature request?