Bug 245437 [Preferences] (HEAD) Preference pages not scrollable (accessible) via keyboard
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
if (showingError) {
				
				showingError = false;
			}
		}
		else {
			message = errorMessage;
			messageType = IMessageProvider.ERROR;
			if (!showingError) {
				
				showingError = true;
			}
		}  
		messageArea.updateText(message,messageType);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.preference.IPreferencePageContainer#updateTitle()
	 */
	public void updateTitle() {
		if(currentPage == null) {
			return;
		}
		messageArea.showTitle(currentPage.getTitle(), currentPage.getImage());
	}
	/**
	 * Update the tree to use the specified <code>Font</code>.
	 * 
	 * @param dialogFont