Improve search UX

[Friptick]

To reproduce:

• hit '/' and enter search term
• the first result will appear highlighted and typing n will go to the next and so on
• but the text cannot be scrolled while the search is active

If I want to read the rest of the paragraph containing the search term, I need to quit search with q. To go to the next result, I now need to type / and the whole search term over again.

Quick solution: allow scrolling while search is active.

Alternative solution: automatically populate search field with last search term so that the user only needs to type / and Enter to resume the search.

Thanks.