Add setting for search to ignore diacritical marks

[TeutonJon78]

As more and more tags are finally starting to use UTF characters over ASCII, it would be nice if the search feature could have an option to ignore those diacritical marks. For example, searching for "Celine Dion" should find "Céline Dion".

It would be helpful for when you remember a name but not necessarily all the special characters.