move SysTray code into a plugin
Some users have a problem to start Spark, it seems to be an AMD 64bit JVM problem.
It may help to update the JVM to the last version but if this does not help the users can't use Spark.
Moving the whole systray code into a plugin will help these users and is also a big step into a Java-Only Spark version.
We must not do that! We use java 6 features!
Thanks all poeple for help!