Highlight the search term(s) in the page when clicking a search result

E.g. when searching for 'vital statistics' which brings up https://imagej.net/editing/index as first search result, it would be great to have the original search terms highlighted (possibly via some Javascript), so you can easily find what you were looking for on larger pages.

Inspect how the site's search result links to the target page and where the original query is available in the JavaScript search flow. Use the example search for “vital statistics” and the editing/index page to verify that the search term or terms are highlighted after navigation.

Written by the indexing model from the issue text.