[javascript] make inlinedform-added event bindable
$(form).trigger('inlinedform-added') was not usable since form
had no existence outside the inner callback.
Use the general CubicWeb object to trigger the event so it's easy
to bind a callback wherever it's needed.
CubicWeb.require('ajax.js');
function removeBookmark(beid) {
d = asyncRemoteExec('delete_bookmark', beid);
d.addCallback(function(boxcontent) {
reloadComponent('bookmarks_box', '', 'boxes', 'bookmarks_box');
document.location.hash = '#header';
updateMessage(_("bookmark has been removed"));
});
}