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
void selectCurrentPageAgain() {
		if (lastSuccessfulNode == null)
			return;
		getTreeViewer().setSelection(new StructuredSelection(lastSuccessfulNode));
		currentPage.setVisible(true);
	}
	/**
	 * Selects the saved item in the tree of preference pages. If it cannot do
	 * this it saves the first one.
	 */
	protected void selectSavedItem() {
		IPreferenceNode node = findNodeMatching(getSelectedNodePreference());
		if (node == null) {
			IPreferenceNode[] nodes = preferenceManager.getRoot().getSubNodes();
			if (nodes.length > 0)
				node = nodes[0];
		}
		if (node != null) {
			getTreeViewer().setSelection(new StructuredSelection(node), true);
			
			getTreeViewer().getControl().setFocus();
		}
	}
	/**
	 * Display the given error message. The currently displayed message is saved
	 * and will be redisplayed when the error message is set to
	 * <code>null</code>.
	 * 
	 * @param newErrorMessage
	 *            the errorMessage to display or <code>null</code>