frs

Adds range slider widget for Facets 3.
For Drupal commerce price numeric field for example.

Post-Installation

- Add variations:entity:price:number field to search_api index.
- In views` facets processor (in settings of an Facet category exposed filter) tick "Custom Facets Exposed Range Slider"
Ticks "Range slider" and "Slider" must be unchecked.
- In Better Exposed Filters settings of the exposed filter, in "Exposed filter widget:" choose "Custom Facets Exposed Sliders".

Additional Requirements

Facets 3, Better Exposed Filters 7.
But we don't need facets` facets_range_widget submodule
and it's dependees: jquery_ui_slider, jquery_ui_touch_punch.