On closing MP Configuration with "OK" the hostname is reset to an empty string if the TV Server is not reachable in this moment. A warning dialog is displayed, but the user cannot handle the situation properly, since it is not possible to keep the old hostname.

h4. Steps to Reproduce
Stop tvservice and start MP Configuration. Without modifying anything close it with "OK". A message box will appear if you want to review the hostname. If you answer "Yes", the hostname is colored red and cannot be "repaired" by checking the TV server connction (since the TV Server is not reachable). If you answer "NO" the hostname is saved as an empty string to MediaPortal.xml.

h4. Additional Information
Bugfix: Closing MP Configuration with a missing connection to the TV Server is only prevented now if the hostname was modified or explicitely checked as invalid. Otherwise the gentle.config file is updated silently. If this fails (due to the non reachable TV Server) a warning message and log are produced, but the MP Configuration is closed and the hostname is not reset.