Bug 129309 [Workbench] allow 'Copy' on the status line
bundles/org.eclipse.jface/src/org/eclipse/jface/action/StatusLine.java
* Sets the error message text to be displayed on the status line. The image
	 * on the status line is cleared.
	 * 
	 * @param message
	 *            the error message, or <code>null</code> for no error message
	 */
	public void setErrorMessage(String message) {
		setErrorMessage(null, message);
	}
	/**
	 * Sets an image and error message text to be displayed on the status line.
	 * 
	 * @param image
	 *            the image to use, or <code>null</code> for no image
	 * @param message
	 *            the error message, or <code>null</code> for no error message
	 */
	public void setErrorMessage(Image image, String message) {
		fErrorText = trim(message);
		fErrorImage = image;
		updateMessageLabel();
	}
	/**
	 * Applies the given font to this status line.
	 */
	public void setFont(Font font) {
		super.setFont(font);
		Control[] children = getChildren();
		for (int i = 0; i < children.length; i++) {
			children[i].setFont(font);