Apply text-overflow and tooltip to multiple selected items in nuxeo-selectivity

When a directory entry with a very long label is selected using a nuxeo-directory-suggestion element, the inner nuxeo-selectivity displays it without regard to text overflow, resulting in the label being cut off at the very end of the panel.

The style text-overflow: ellipsis should be applied to shorten the visible value while enabling tooltips such that the full length value can be seen as desired.

(See screenshot for reference of current behavior)