Adding drawings to a set meant opening the library dialog, then the set
editor, then a second copy of the library in pick mode, then backing out
again. The set editor now has the library as its left pane (unfiltered,
searchable, sortable, paged): select drawings and Add to Set, double-click
or press Enter. Members already in the set are greyed. The library
dialog's pick mode had no other caller and is removed.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>