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
/**
	 * Shows the preference page corresponding to the given preference node.
	 * Does nothing if that page is already current.
	 * 
	 * @param node
	 *            the preference node, or <code>null</code> if none
	 * @return <code>true</code> if the page flip was successful, and
	 *         <code>false</code> is unsuccessful
	 */
	protected boolean showPage(IPreferenceNode node) {
		if (node == null)
			return false;
		
		if (node.getPage() == null)
			createPage(node);
		if (node.getPage() == null)
			return false;
		IPreferencePage newPage = getPage(node);
		if (newPage == currentPage)
			return true;
		if (currentPage != null) {
			if (!currentPage.okToLeave())
				return false;
		}
		IPreferencePage oldPage = currentPage;
		currentPage = newPage;
		
		currentPage.setContainer(this);