[web, formatting] move Interval data type display logic from final view to printable_value (closes #1984742)
also, fix implementation so that negative time delta are properly considered
/*
* 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;
}