naming convention for icon files
--------------------------------

each icon has to be provided in different versions in order 
to represent the according state for icon.

the naming convention is: "$icon_basename$_$state_name_string$.gif" 
 

  	state name string							description
 ------------------------------------------------------------------------- 
	_ok						used for items that are fully mapped/used/etc.
	
	_not_conntected			used for items that are mapped but having no 
							target node assigned. 
	
	_warnung				used for items that are fully mapped but the assigned 
							target item was replaced by a new one. 

	_fehler					used when for items to indicate some kind of error.

 
Note: 
icons having "_rot" in filename are used to indicate some kind of "required" status for according item.

