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/UpdateStrategy.java
fromType, toType);
		if (assignableFromModelToModelConverter != null
				&& !assignableFromModelToModelConverter.booleanValue()) {
			throw new BindingException(errorString
					+ " Expected: " + fromType + ", actual: " + toType); 
		}
	}
	/**
	 * Tries to create a converter that can convert from values of type
	 * fromType. Returns <code>null</code> if no converter could be created.
	 * Either toType or modelDescription can be <code>null</code>, but not
	 * both.
	 * 
	 * @param fromType
	 * @param toType
	 * @return an IConverter, or <code>null</code> if unsuccessful
	 */
	protected IConverter createConverter(Object fromType, Object toType) {
		if (!(fromType instanceof Class) || !(toType instanceof Class)) {
			return new DefaultConverter(fromType, toType);
		}
		Class toClass = (Class) toType;
		if (toClass.isPrimitive()) {
			toClass = autoboxed(toClass);
		}
		Class fromClass = (Class) fromType;
		if (fromClass.isPrimitive()) {
			fromClass = autoboxed(fromClass);
		}
		if (!((Class) toType).isPrimitive()