As the list box filters have the "(All)" option, the customer is using the list box property controls to work around this.
The list box property control, on the other hand, does not include the search functionality which is required as they have a lot of values.
So the customer would like to add the ability to search, for list box property controls.
Also, It's annoying how when the user is going down the list and choosing the columns to include in the table, if you choose several, and then decide to add something above your last choice, it always jumps down to the last column you selected (see video - https://youtu.be/zse_-kDNiUg). Ideally, this listbox should function exactly the way that listbox in the filter menu, where you can choose various items in whatever order holding the ctrl key, and the list doesn't always jump down to the last item selected.
YES - just implemented my first property control and find it clunky to use without the listbox filter.