Add a "select all" check box in the subsections after a search

[salcoast]

Would like to request a "select all" check box in the subsections after a search

A select all check box intead of having to click on all items in a sub section "Datasets", "Types", "Countries", "Languages", "E-Mails", etc. which can sometime be quite large

[kjacks]

Related to #1859

[tillprochaska]

For facets with a lot of options, only the most frequent options are displayed initially. Users can then load more options via the "Show more…" link at the end of the list.

Most users (?) would probably expect a "select all" checkbox to select all available facet options, not only the ones that are currently displayed. In a rather trivial implementation, this would mean loading all options.

Depending on the search query, it is possible that there are a lot of facet options available:

In those cases, loading all options is likely going to be a problem. I’m not sure though if this is only a theoretic problem, or if it’s something users would actually run into frequently?

[sunu]

I would prefer closing this as "won't fix" in favour of #1859. Selecting too many facets makes the search query performance worse. If we support excluding specific values as mentioned in #1859, IMO a select all option does not provide any extra utility.

[sunu]

Also, fwiw this is not a trivial issue to fix. Neither is #1859. Removing the "low hanging fruit" label.