php-horde-tree 2.0.5-1 (amd64 binary) in ubuntu bionic

 A tree view of hierarchical information. It allows for expanding/collapsing of
 branches and maintains their state.
 .
 This package is part of Horde, a web application Framework written in PHP with
 modules like IMP (webmail), Turba (contacts), Kronolith (calendar), Nag (task
 list), Gollem (file manager), etc.