Highlight search term on page

[mgrabovsky]

When searching for a keyword via the search box, it would be nice to highlight the matching words on the target page. For instance, when searching for “emis”, all the words that match the query should be highlighted – in a similar way as in the search box:

We already append the query via the ?q=... parameter in the URL, which makes this a lot easier. The mark.js library looks like it could be used to make the rest straightforward.