Bug 7235 [Contributions] Need dispose() for action delegates
bundles/org.eclipse.ui.workbench/extensions/org/eclipse/jface/action/StatusLineManager.java
*/
public void setCancelEnabled(boolean enabled) {
	if (statusLineExist())
		statusLine.setCancelEnabled(enabled);
}
/* (non-Javadoc)
 * Method declared on IStatusLineManager.
 */
public void setErrorMessage(String message) {
	if (statusLineExist())
		statusLine.setErrorMessage(message);
}
/* (non-Javadoc)
 * Method declared on IStatusLineManager.
 */
public void setErrorMessage(Image image, String message) {
	if (statusLineExist())
		statusLine.setErrorMessage(image, message);
}
/* (non-Javadoc)
 * Method declared on IStatusLineManager.
 */
public void setMessage(String message) {
	if (statusLineExist())
		statusLine.setMessage(message);
}
/* (non-Javadoc)
 * Method declared on IStatusLineManager.
 */
public void setMessage(Image image, String message) {