PROV-1046 Added Set Tools to Lists/Vocabularies inspector widgets

There were a couple of bugs that I noticed and fixed along the way, the
most important being that ca_list_items and ca_set_items have the same
primary key name which caused all kinds of weird interactions in
ca_sets::getItems(). We now have some special treatment for
ca_list_items that basically renames ca_list_items.item_id in the SQL
query instead of SELECTing ca_list_items.*