Bug 140576 [JFace] dialog has no icon or clipped error icon
1) for a Java Project select 'Configure Build Path' in context menu and goto tab 'Libraries' 2) edit Access Rules for a library (e.g. JRE System...) 3) see that the dialog and its children have no window icon
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/StatusDialog.java
* Returns the last status.
	 * @return IStatus
	 */
	public IStatus getStatus() {
		return fLastStatus;
	}
	/**
	 * Updates the status of the ok button to reflect the given status.
	 * Subclasses may override this method to update additional buttons.
	 * 
	 * @param status
	 *            the status.
	 */
	protected void updateButtonsEnableState(IStatus status) {
		if (fOkButton != null && !fOkButton.isDisposed()) {
			fOkButton.setEnabled(!status.matches(IStatus.ERROR));
		}
	}
	/*
	 * @see Window#create(Shell)
	 */
	protected void configureShell(Shell shell) {
		super.configureShell(shell);
		if (fTitle != null) {
			shell.setText(fTitle);
		}
	}
	/*
	 * @see Window#create()
	 */