Find and Replace function

A minor update has been released, build 2.0.5305. (Consider this a beta, I have done minimal testing)

I have a added Search menu item which performs Find and Replace actions on the editor.
Also several minor bug fixes.

Documentation to come on Find/Replace, works much as you would expect but beware; there are no restrictions on replacing message delimiter characters, so Replace can change the message structure. Just remember there is no undo action available.