This commit adds a stat button in the form view `hr.employee` model
to be able to go to the org chart and visualize the hierarchy of
the current record displayed in the form view.
The action used inside that stat button cannot have a domain to filter
the result to just have the current record since the user will not
be able to search into the search view. The alternative is to use
a context used inside the hierarchy view to add the domain only when
we load the view (as it is a default domain).
task-3376776
Xavier Bol (xbo)
77afd2833f