'Show more' stepped/incremental option

We're in the need of this also and will work on this.

Created a patch for this that allows you to select 'Step' amount (using the same values of the soft limit) in a facet's settings.
Every interaction with the show more link will reveal additional items equal to the step setting.
When all items are revealed, interacting with the show less link will hide all items over the soft limit (going back to the initial state).

Thank you for finishing our patch @steven.d, it seems I forgot to update the tests. This still needs works.

This would be a great feature. I found this issue because I have a very similar use case. Did you solve it?

@potassiumchloride the patch includes the functionality but tests needs updates to allow this to be committed.