Dashboard Filter Bug

[jkmarx]

• Specific code commit: 7969dc1
• Version of the web browser and OS: 49.0.1, 10.11.6 El Capitan
• Environment where the error occurred (Vagrant VM and site conf mode or AWS instance):
  https://test.stemcellcommons.org/#/

Steps to reproduce

Please list all the actions and the input data used:

1. Select own data set data set filter (note number returned)
2. Select own and public data set filter (note number returned)
3. Remove public data set filter and leave own selected (note number returned)

Observed behavior

Expected behavior

Filters should return consistent and correct data sets

Other combinations malfunction also. Please test different patterns.

[jkmarx]

API requests are sent only for the last item selected.

Filter method enables chaining according to comments below.
commons / data sets / interface
data set filter method:

   * Set the data source to the general data API and add a filter option.
   *
   * @method  filter
   * @author  Fritz Lekschas
   * @date    2015-10-08
   *
   * @param   {Object}  filter  Key value pairs of filters.
   *   E.g. `{'is_owner': true}`
   * @return  {Object}          Instance itself to enable chaining.
   */
  DataSet.prototype.filter = function (filter) {
    _search = false;

    // _browsePath = [];
    _clearOrderCache();
    _source = new DataSetDataApi(filter);

    return this;
  };```