JBIDE-16702 - fixing warning message in last page of downloadRuntime wizard page
JBIDE-16819 - messed up tracing. Null check added
JBDS-2848 Usage Stats for actual used features
JBDS-2848 Added try{}catch{} to make sure Usage doesn't prevent JBT from working in case of bugs
added IObservablePojo#firePropertyChange