fix agent owner of a child agent (ref: #450)
add destroy action to Traits\ControllerSoftDelete;
add check permission after destroy an entity;
add tests for destroy permission;
add destroy buttons in panel and entity-editable bar (ref: #430)
fix: remove entity cache in repository cache after remove the entity (ref: #422)
fix: nl2br for long and short description in single (ref: #451)