Bug 93245 [Dialogs] Error messages show up in two locations in the properties dialog
Force an error message: 1) select a Java project 2) open the properties dialog 3) navigate to Java Compiler>Building 4) enable project specific settings 5) enter a letter into the maximum number of problems field ->the error message shows up at the bottom 6) resize the dialog ->the error message also shows up in the banner
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
*/
	protected IPreferencePage getPage(IPreferenceNode node) {
		return node.getPage();
	}
	/**
	 * Shows the "Page Flipping abort" dialog.
	 */
	void showPageFlippingAbortDialog() {
		MessageDialog.openError(getShell(), JFaceResources
				.getString("AbortPageFlippingDialog.title"), 
				JFaceResources.getString("AbortPageFlippingDialog.message")); 
	}
	/**
	 * Updates this dialog's controls to reflect the current page.
	 */
	protected void update() {
		
		updateTitle();
		
		updateMessage();
		
		updateButtons();
		
		setSelectedNode();
		firePageChanged(new PageChangedEvent(this, getCurrentPage()));
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.preference.IPreferencePageContainer#updateButtons()