- Loads the facet data on demand asynchronously, potentially improving performance.

- Adding data-lightbox-image attribute.
- Checks data-lightbox-href/href/src for a URL that links to an image.
- Puts url in img tag.
- Wraps img with .lightbox-image div.

- In smaller screen sizes, display a button to expand the sidebar instead of having a wide border.

- Replaces previous feedback system in a backward-compatible way.

- Switch to Slick.js as basis for carousels (instead of homegrown library)
- Make user interface more compact and less overwhelming
- Fix right-to-left language support
- Fix problems with popover behavior
- Contain channels Javascript code in the VuFind object for better scoping

- Fix hierarchical facets and make exclude link placement more consistent.
- Fix more link position and disable exclude link from selected facets.
- Remove obsolete excludable class.

- Multiple configurable layouts are now available.
- Template code has been significantly refactored/simplified.

- Update facets.js to create HTML for hierarchical facets using jQuery and with the correct structure.
- Fix exclude links in hierarchical facets.
- Display "Loading..." message in hierarchical facets.
- Resolves VUFIND-1279

- Use buttons so that facets can be expanded or collapsed using the keyboard.
- Make it possible to select a hierarchical facet value also when a screen reader is active (they tend to swallow normal keyboard events).
- Use role="heading" for the srmessage so that it can be easily found and read.
- Use additional sr text in active filter list and for selected checkbox facets to signify that the link will remove the filter.