Try / MapTry with ErrorHandler for specific Exceptions

[NormanMann]

With MapTry I can provide an errorhandler that is supposed to convert the exception in an error or error string. In my case I only want to deal with certain exceptions (e.g. OdbcException) and turn them into beautified errors. All other exceptions should just throw.

While I could use 'throw ex' in my errorhandler, that would mess with the call stack. May returning an Error could be optional (null value) in which case the Try would just throw.