Show context of findall result items

[chris-ca]

When searching for a string in the whole diary using "find all", the result list currently always shows the date and the first 20 characters of each page. Often the beginning of a page is unrelated to the search term (or it might even be the same for all search results, e.g. when using a template).

Instead, a better search result would show the context for each item, e.g. the surrounding [n] words or lines.

[billthefarmer]

OK, that will be in the next version...