Filtering by logger name doesn't appear to work. Dialog says "The new expression is not correct." for a number of filter expressions that seem correctly formed.

Example use case: I'm trying to filter to accept DEBUG messages from my code, but deny such messages from Spring, whose loggers are called "org.springframework...".

Example reproduction: I try the following and keep getting "The new expression is not correct." There is no error in the Eclipse error log or in the console.
logger.contains("org.springframework")
event.getLoggerName().contains("org.springframework")

(Guessing types of these supplied variables from http://logback.qos.ch/manual/filters.html#evalutatorFilter.)

Filtering on the message appears to be accepted by the config window:
message.contains("org.springframework")
but it doesn't apply any filtering to the logger name. (Here the logger name actually gets compacted to "o.s...." but trying other, non-compacted, segments of the name doesn't help either.) I assume that this is intended behaviour.

For now I can filter out things like "reating instance" or "bean", but that's hardly satisfactory. Some more examples in the plugin documentation would be mighty handy.