displays warning only in case of time consuming constraint

refs 2620

org.fortiss.tooling.kernel.ui/trunk/src/org/fortiss/tooling/kernel/ui/internal/ConstraintVerificationUIService.java

@@ -58,7 +58,7 @@ import org.osgi.framework.Bundle;
  * @author aravantinos
  * @author $Author$
  * @version $Rev$
- * @ConQAT.Rating YELLOW Hash: E57DB924DA58FFCFD383BF4113939533
+ * @ConQAT.Rating YELLOW Hash: F0F36DEA1D0BC7FA09674BFD33CE617D
  */
 public final class ConstraintVerificationUIService implements IConstraintVerificationUIService,
 		IIntrospectiveKernelService {
@@ -383,7 +383,7 @@ public final class ConstraintVerificationUIService implements IConstraintVerific
 		activatedConstraints.get(top).add(id);
 		List<Constraint> addeds =
 				IConstraintVerificationService.getInstance().addMissingConstraints(top, id);
-		if(!addeds.isEmpty()) {
+		if(!addeds.isEmpty() && getFirstVerifier(id).isTimeConsuming()) {
 			ConstraintsUIUtils.displayTimeConsumptionWarning(id);
 		}
 		// Install notifiers for newly added constraints
@@ -422,7 +422,6 @@ public final class ConstraintVerificationUIService implements IConstraintVerific
 			// No need to check if it turns out the status is already known from a previous
 			// activation.
 			if(!IConstraintVerificationService.getInstance().isUpToDate(c) ||
-					c.getVerificationStatus() == null ||
 					c.getVerificationStatus() instanceof OutdatedVerificationStatus) {
 				getFirstVerifier(c).onOutdate(c);
 			}