Adding the ability to use the Manual mode for price navigation step, …

[romainruaud]

Add the ability to use the Magento configuration for the Price Navigation Step Calculation : the "Manual" mode is now supported and will use the "Default Price Navigation Step" field when rendering the price slider.

This can allow to have much lighter aggregations when having a wide range of prices displayed, like in #77

Could be merged only in 2.2.x since it's more a new feature than a bugfix.

[southerncomputer]

how about adding min_doc_countclass Histogram
in core/../Histogram.php

{
/**
* Build the aggregation.
*
* @param BucketInterface $bucket Histogram bucket.
*
* @return array
*/
public function buildBucket(BucketInterface $bucket)
{
return ['histogram' => ['field' => $bucket->getField(), 'interval' => $bucket->getInterval(),'min_doc_count'=>1]];
}
}
`
this helped with massive amounts of price variance!