Bug 182780 [DataBinding] Default a converter for IStatus to String
The converter used to display an IStatus uses toString(). This outputs a fairly ugly status message. We should create a default converter and use this in UpdateValueStrategy to return just the message of the status.
bundles/org.eclipse.core.databinding/src/org/eclipse/core/databinding/AggregateValidationStatus.java
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package org.eclipse.core.databinding;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.eclipse.core.databinding.observable.IChangeListener;
import org.eclipse.core.databinding.observable.IObservableCollection;
import org.eclipse.core.databinding.observable.IStaleListener;
import org.eclipse.core.databinding.observable.Realm;
import org.eclipse.core.databinding.observable.value.ComputedValue;
import org.eclipse.core.databinding.observable.value.IObservableValue;
import org.eclipse.core.databinding.observable.value.IValueChangeListener;
import org.eclipse.core.databinding.util.Policy;
import org.eclipse.core.internal.databinding.BindingMessages;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.MultiStatus;
import org.eclipse.core.runtime.Status;
/**
 * This class can be used to aggregate status values from a data binding context
 * into a single status value. Instances of this class can be used as an
 * observable value with a value type of {@link IStatus}, or the static methods
 * can be called directly if an aggregated status result is only needed once.
 * 
 * @since 1.0
 * 
 */
public final class AggregateValidationStatus implements IObservableValue {
	private IObservableValue implementation;
	/**