DropdownField search threshhold is hardcoded to 20

[Oliver996]

The DropdownField already has a search for the options, but it's only displayed when there are more than 20 entries. I would like to use it with less than 20 entries, but I did not find an option to force the search to be displayed. Is there an option for that or could one be added?

[GuySartorelli]

Unfortunately the value is currently hardcoded to specifically 20 items. This is in https://github.com/silverstripe/silverstripe-admin/blob/1/client/src/legacy/LeftAndMain.js#L118

If you want to create a PR to make this configurable then I'd be happy to look at it, but this is a low priority at the moment.

You might want to use ListboxField instead in the meantime.