add auto scroll in dropdown user group filter#41

Franck-Boost wants to merge 1 commit intomainFranckBoostOrg/Umbraco-CMS:mainfrom

v15/fix-bug/scroll-down-user-group-filterFranckBoostOrg/Umbraco-CMS:v15/fix-bug/scroll-down-user-group-filterCopy head branch name to clipboard