Suggestion for similar strings

The Problem:
often, when in a string changes a punctuation or a word, the entire translation(s) are trashed. This is a problem for long strings.

The solution
Using similar_text() to find similar source string (i think similar for 80%, we could discuss about it) and propose to the user relative translations for that string as a suggestion tab. Our battle will be to not destroy the server during the search :)