Most field widgets are synchronous, but some of them have to do extra
work before being ready (for example, the pad widget, or widget which
needs to lazy load JS/CSS files). Because of that, the new views have
been well tested with synchronous widgets, but not completely with async
widgets.
Some code depended upon the fact that the widget was ready immediately
after being created. This was incorrect, and is fixed in this commit,
by adding a new hook that is called in (basic) views after a widget is
ready (meaning, start and willstart are done)
Géry Debongnie
d6ff8c8351