Make Services accept/reject all in selection.

Replaced the addition, deletion and substitution regular expression
searches with substitutions and I daisy chained the outputs of the 
substitutions. This means that it's not longer necessary to select
_only_ the critic markup section; it's possible to select any text,
as long as it contains the markup to accept/reject.

It's now possible to select a section with multiple edits,
even the whole document and "accept all" or "reject all".