[FIX] web: retro compatible patch for a8f94a59

Some views are not appended to the element oe_view_manager_body, such as client actions views.
For these cases, we append the element to the view manager element

Besides, we set the appendTo option of jquery ui autocomplete after a first initialization, because of a Jquery ui bug:
http://bugs.jqueryui.com/ticket/8858