updated startup script for thread-safety and look and feel

* added support for native look and feel

* moved window initialisation inside event dispatching thread
Some look and feels enforce beeing used from in the right thread.

* setVisible sould not be called inside the constructor (of GUIMain)
The caller (Boot) is resposible for it.

Signed-off-by: Dr. Kegel <dr.kegel@yahoo.com>
added support for wordbreaks

* replaced wildcard imports
* added wordbreaks in chattext

Signed-off-by: Dr. Kegel <dr.kegel@yahoo.com>
cleanup chat history

* I had to set chat viewer margins
* added source from last commit

Signed-off-by: Dr. Kegel <dr.kegel@yahoo.com>