BDE should not force an ORDER BY clause and rely on the user to provide its own order

In line https://github.com/nuxeo/nuxeo-browser-extension/blob/master/app/scripts.babel/popup.js#L473 , the BDE enforces a default sort order on dc:modified

When a user provides his own ORDER BY clause in a NXQL query, the result is then that there exists 2 ORDER BY clauses in 1 NXQL query, which is invalid

If not providing a defaut sort order, as is done in the UI NXQL query, this would let the user request a particular order.

When reproducing, when specifying e.g. ORDER BY dc:modified in an NXQL query, no result is actually returned, and no other symptom at the user level.