Bug 320788 [Model] The model misses the possibility to define mnemonics for Menu-Elements
It looks like we forgot to add mnemonics to the Menu-Element like we have one in the MenuItem
bundles/org.eclipse.e4.ui.model.workbench/src/org/eclipse/e4/ui/model/application/ui/menu/impl/MenuElementImpl.java
*   <li>{@link org.eclipse.e4.ui.model.application.ui.menu.impl.MenuElementImpl#getIconURI <em>Icon URI</em>}</li>
 *   <li>{@link org.eclipse.e4.ui.model.application.ui.menu.impl.MenuElementImpl#getTooltip <em>Tooltip</em>}</li>
 *   <li>{@link org.eclipse.e4.ui.model.application.ui.menu.impl.MenuElementImpl#getLocalLabel <em>Local Label</em>}</li>
 *   <li>{@link org.eclipse.e4.ui.model.application.ui.menu.impl.MenuElementImpl#getLocalTooltip <em>Local Tooltip</em>}</li>
 *   <li>{@link org.eclipse.e4.ui.model.application.ui.menu.impl.MenuElementImpl#getLocalImage <em>Local Image</em>}</li>
 * </ul>
 * </p>
 *
 * @generated
 */
public abstract class MenuElementImpl extends UIElementImpl implements MMenuElement {
	/**
	 * The default value of the '{@link #getLabel() <em>Label</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getLabel()
	 * @generated
	 * @ordered
	 */
	protected static final String LABEL_EDEFAULT = null;
	/**
	 * The cached value of the '{@link #getLabel() <em>Label</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @see #getLabel()
	 * @generated
	 * @ordered
	 */
	protected String label = LABEL_EDEFAULT;
	/**