[FIX] correctly call form field's update_dom in all cases in editable listview

Form fields are extended/replaced in editable list view in order to
handle @invisible and @tree_invisible correctly in editable-list-form
context (base semantics of @invisible are different between listview
and formview, formview's @invisible is listview's @tree_invisible, and
instead of removing element from visible DOM listview's @invisible
only hides the element but it keeps the space it's taking).

As a result, listview editable needs to override Widget.update_dom for
pretty much all form widgets, in order to manage this difference in
behavior.

In case of @tree_invisible, it did so correctly setting and unsetting
its stuff and calling this.super() to execute the widget's actual
update_dom triggers **but it did not do so when the element was really
visible**.

As a result, in editable listview elements would never appear required
(blue background), invalid (red background) or disabled (gray),
although they were correctly set up, because the display layer was
never updated.

bzr revid: xmo@openerp.com-20111004151031-65o0q8e86op7kdks

addons/web/static/src/js/view_list_editable.js

@@ -325,11 +325,13 @@ openerp.web.list_editable = function (openerp) {
                 this.$element.children().css('visibility', '');
                 if (this.modifiers.tree_invisible) {
                     var old_invisible = this.invisible;
-                    this.invisible = !!this.modifiers.tree_invisible;
+                    this.invisible = true;
                     this._super();
                     this.invisible = old_invisible;
                 } else if (this.invisible) {
                     this.$element.children().css('visibility', 'hidden');
+                } else {
+                    this._super();
                 }
             }
         });