/// Updates screen labels and some other information associated with
/// insets and paragraphs. Actually, it's more like a general "recurse
/// through the Buffer" routine, that visits all the insets and paragraphs.
/// Updates screen labels and some other information associated with
/// insets and paragraphs. Actually, it's more like a general "recurse
/// through the Buffer" routine, that visits all the insets and paragraphs.