Bug 122687 Libraries dont appear to allow background colors on tables to be used
If I create a table and set the background color to blue in my library and then drag the table from the library to the report the background color does not go with it.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
* User-defined elements can extend other elements, but style element is not
 * allowed to extend each other. The following is the terminology used for this
 * system.
 * <ul>
 * <li>If element E extends element D, then D is said to be the
 * <em>parent </em> element, and element E is the <em>derived </em> element.
 * </li>
 * <li>We can also use the term <em>base </em> as a synonym for parent. That
 * is, D is the base element above.</li>
 * <li>Element D may in turn extend another element C.</li>
 * <li>We say that C and D are <em>ancestor </em> elements of E, and that D
 * and E are <em>descendents </em> of C.</li>
 * <li>In this simple hierarchy, element E is the <em>most derived </em>
 * element, while element C is the <em>most base </em> element.</li>
 * </ul>
 * <p>
 * Inheritance applies to the following:
 * <p>
 * <dl>
 * <dt><strong>Property values </strong></dt>
 * <dd>An element inherits any property values defined by any of its ancestors.
 * If two ancestors define values for the same property, then the inherited
 * value is that defined by the most derived ancestor. This rule is similar to
 * the method overriding rules in Java.</dd>
 * 
 * <dt><strong>Named style </strong></dt>
 * <dd>If an ancestor element explicitly names a style, then the derived
 * element will also use that style (unless the derived element specifies a
 * different style.)</dd>
 *