Change jQuery Promises into Ecma Promises

Created by: r03ert0

Is this a feature request or a bug report?

This is an enhancement request

What is the current behaviour?

Currently brainbox uses jQuery promises, which look like this:

function foo() {
  var def = new $.Deferred();
  if(result_of_async_process_is_ok) {
    def.resolve();
  } else {
    def.reject();
  }
  return def.promise();
}

What is the expected or desired behavior?

Use standard ES promises, which look like:

functio foo() {
  var pr = new Promise(function(resolve, reject) {
    if(result_of_async_process_is_ok) {
      resolve();
    } else {
      reject();
    }
    return pr;
  });

Other than that, brainbox uses the $.when promises, which should be replaced with Promise.all([]).