How synchronization situation in shadows should be updated. EXPERIMENTAL

Item Summary
Name	Type	Multiplicity	Description
skipWhenNoChange	property boolean	[0,1]	Situation update is skipped if there's no change.

Items
- skipWhenNoChange
  
  Flags: RAM,runtime
  
  Multiplicity: [0,1]
  
  Situation update is skipped if there's no change. The default is false. (This will be probably replaced by more sophisticated condition.)