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
pageContainer.setLayoutData(new GridData(GridData.FILL_BOTH));
		
		Label bottomSeparator = new Label(parent, SWT.HORIZONTAL | SWT.SEPARATOR);
		bottomSeparator.setLayoutData(new GridData(GridData.FILL_HORIZONTAL | GridData.GRAB_HORIZONTAL));
		return composite;
	}
	/**
	 * Create the sash with right control on the right. Note 
	 * that this method assumes GridData for the layout data
	 * of the rightControl.
	 * @param composite
	 * @param rightControl
	 * @return Sash
	 * 
	 * @since 3.1
	 */
	protected Sash createSash(final Composite composite, final Control rightControl) {
		final Sash sash = new Sash(composite, SWT.VERTICAL);
		sash.setLayoutData(new GridData(GridData.FILL_VERTICAL));
		sash.setBackground(composite.getDisplay().getSystemColor(SWT.COLOR_LIST_BACKGROUND));
		
		
		sash.addListener(SWT.Selection, new Listener() {
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
			 */
			public void handleEvent(Event event) {
				if (event.detail == SWT.DRAG)