Implement a default dialog for the logging service.
- Add a default dialog and handler class.
- Move the main parts of the service from the base plugin to the kernel.
- Introduce a severity enum since using int "codes" is flawed and we do not use underlying eclipse methods like the logging methods in the LoggingUtils class.
Issue-Ref: 3575 Issue-Url: https://af3-developer.fortiss.org/issues/3575 Signed-off-by: Alexander Diewald diewald@fortiss.org