Merge pull request #1083 from hbrunn/8.0-web_export_view-dont_fail_without_parent

[FIX] don't fail if there's no parent (any more)

web_export_view/static/src/js/web_export_view.js

@@ -25,11 +25,11 @@ openerp.web_export_view = function (instance) {
     instance.web.Sidebar.include({
         redraw: function () {
             var self = this,
-                view_manager = self.getParent().ViewManager,
+                view_manager = self.getParent() && self.getParent().ViewManager,
                 view_name = view_manager && view_manager.active_view,
                 active_view = view_name && view_manager.views[view_name];
             this._super.apply(this, arguments);
-            if (active_view.controller instanceof instance.web.ListView) {
+            if (active_view && active_view.controller instanceof instance.web.ListView) {
                 self.$el.find('.oe_sidebar').append(QWeb.render('AddExportViewMain', {widget: self}));
                 self.$el.find('.oe_sidebar_export_view_xls').on('click', self.on_sidebar_export_view_xls);
             }