addMainTab(gettext('Editor'), 'editor', views.visualEditing.getAsView());
addMainTab(gettext('Source'), 'sourceEditor', '');
addMainTab(gettext('History'), 'history', views.diffLayout.getAsView());
sandbox.getDOM().append(views.mainLayout.getAsView());
addMainTab(gettext('Editor'), 'editor', views.visualEditing.getAsView());
addMainTab(gettext('Source'), 'sourceEditor', '');
addMainTab(gettext('History'), 'history', views.diffLayout.getAsView());
sandbox.getDOM().append(views.mainLayout.getAsView());