I fully agree that this would be very useful. but keep in mind that it
might not be possible or very hard to get the right items to show up.
why? just assuming: since the project does not really know what items
you want and might return too much dimensions, maybe even dimensions
which are not useful at all... the reason is (at least I think it is
this way) that at the moment when the dropdown elements are fetched from
database, the project is not able to apply any filters (or only the
static fil...