Issue #2107455 by mparker17, ravi.shankar, yogeshmpawar, pooja saraah,...

Issue #2107455 by mparker17, ravi.shankar, yogeshmpawar, pooja saraah, joseph.olstad, claudiu.cristea, KapilV, ShaunDychko, andileco, drclaw, xjm, alexpott: Allow the $items parameter to be nullable thanks to code sniffer. Image field default value not shown when upload destination set to private file storage

Closes #2107455