The behavior of the datetime widget was to focus in the field every time a date
is chosen. This causes an issue if the datetime widget is called from an
editable list. Indeed, the list editable will consider that the value has been
set, and therefore the value will not be changed anymore if the user choses
another date.
The new behavior is to put the focus only when the date picker is hidden,
therefore the editable list will consider the value set only when the selection
is done.
opw-644062
Fixes#7463
b4efb4eeb3