Bug 85147 [Preferences] filter field: Looses focus on type
20050208 When you type in the filter field, the focus ofter switched to the tree. You have to give the filter field the focus again to continue typing
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
*            The identifier for the page
	 * @since 3.0
	 */
	public void setSelectedNode(String pageId) {
		setSelectedNodePreference(pageId);
	}
	/**
	 * Sets the name of the selected item preference.
	 * 
	 * @param pageId
	 *            The identifier for the page
	 */
	protected void setSelectedNodePreference(String pageId) {
		lastPreferenceId = pageId;
	}
	/**
	 * Changes the shell size to the given size, ensuring that it is no larger
	 * than the display bounds.
	 * 
	 * @param width
	 *            the shell width
	 * @param height
	 *            the shell height
	 */
	private void setShellSize(int width, int height) {
		Rectangle preferred = getShell().getBounds();
		preferred.width = width;
		preferred.height = height;
		getShell().setBounds(getConstrainedShellBounds(preferred));
	}