Bug 95548 Editors page not sized properly on startup
build N20050517, open preferences dialog to editors page (under General). now close and open the dialog again and note that the dialog is too short.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
if(currentPage == null)
			return;
		messageArea.showTitle(currentPage.getTitle(), currentPage.getImage());
	}
	/**
	 * Update the tree to use the specified <code>Font</code>.
	 * 
	 * @param dialogFont
	 *            the <code>Font</code> to use.
	 * @since 3.0
	 */
	protected void updateTreeFont(Font dialogFont) {
		getTreeViewer().getControl().setFont(dialogFont);
	}
	/**
	 * Returns the currentPage.
	 * @return IPreferencePage
	 * @since 3.1
	 */
	protected IPreferencePage getCurrentPage() {
		return currentPage;
	}
	/**
	 * Sets the current page.
	 * @param currentPage
	 * 
	 * @since 3.1
	 */
	protected void setCurrentPage(IPreferencePage currentPage) {
		this.currentPage = currentPage;