... in x2many editable list views.
Field widgets can detect that they are at the origin of a
field_changed event, so that they don't re-render themselves when
they are being edited.
This didn't work for fields inside x2many list views. This wasn't
a big problem for most of the fields, because the cursor position
was automatically reset after a re-rendering, but it wasn't
working for monetary fields that empty their $el before each
re-rendering.
This rev. fixes the issue by making the field widgets inside
x2many list able to detect that they are the origin of a change,
and thus removes the now useless code that restore the cursor
position.