When using screenWidth and there's a regression, only one image is uploaded

[amitaibu]

However, all regression images should be uploaded

  it('should show start page',function(done) {
    client
      .url(baseUrl + '/start')
      .webdrivercss(testName + '.start', {
        name: '1',
        exclude:
          [
            '.narrow-box ul.flat',
            '.get-started.documentation img'
          ],
        screenWidth: selectedCaps == 'chrome' ? [640, 960, 1200] : undefined, // <-- this property
      }, shoovWebdrivercss.processResults)
      .call(done);
  });