No way to return after full-text search

[benwbrum]

If you search within a collection and don't find any results, there is no way in the UI to return to the un-filtered view of the collection or to reset your searc.

[sylvieed]

This wasn't fixed in #3644 because the collection search results UI wasn't changed. Right now, you are able to reset your search by changing the search term in the search bar shown on the right side of the search results page. However, you aren't able to return to the un-filtered view. To fix this, we could add a temporary 'Search' tab when you're on the search results page (paged_search action) so that you can return to the Overview tab, as it wouldn't be active anymore. This is also an issue for the title/metadata search, which is more complicated because those results are still shown on the collection show page. We could probably use the same solution, with a 'Search' tab, it just might be a bit more odd to implement.