I came through this requirement very often that if there is a selection to be made from list of values
user would like if we can allow him to search and auto-suggest instead of scrolling through the dropdown.
I think it's time mendix provide this out-of box as it's common UI/UX pattern
Check out following widget.
This would be indeed usefull as an out-of the box solution.
However, with this widget comming from Mendix it’s possible: