Fix windows packaging:
 - Renamed pms -> ums
 - Load logback configuration from install dir instead of profile dir
 - Avoid DbgPacker crashing ums if debug.log can't be found
Configuration wizard changes:
 - Change message of last dialog to mention the shared files should be configured in the media library tab
Set the look&feel early
 - Extract the method from LooksFrame to GuiUtil
 - Set the look&feel early (if not in headless mode) to use it for the configuration wizard as well