live update node - detection feature

Слиты nikitronn запросил слияние live_update_changes_detection в master

Created by: Durman

Addressed problem description

#2420 (closed)

New features of live update mode

  • Update object nodes only when objects was actually changed.
  • Update only those object nodes which objects was changed.
  • Does not update whole node tree during changing of objects.

Preflight checklist

  • Code changes complete.
  • Code documentation complete.
  • Documentation for users complete (or not required, if user never sees these changes).
  • Manual testing done.
  • Unit-tests implemented.
  • Ready for merge.