[js] add a selector string escaping function
will help use id strings in jquery selector expressions, e.g:
"foo.[subject]:42" -> "foo\.\[subject\]\:42"
Related to #3154531.
/*
* cubicweb js mock for unit tests
* This module defines variables and functions used in quite a few places
* in cw js framework that can't be used or guessed without a real CW server
*/
var pageid = 'my-page-id';
function _(message) {
return message;
}