Bug 94456 [Undo] - Resource Navigator not showing workspace undo actions
The Resource Navigator is not showing the workspace undo actions. Package Explorer is correctly working. Need to look at the difference in the way the action handlers are set up.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/navigator/ResourceNavigator.java
}
    }
    /**
     * Updates the action bar actions.
     * 
     * @param selection the current selection
     * @since 2.0
     */
    protected void updateActionBars(IStructuredSelection selection) {
        ResourceNavigatorActionGroup group = getActionGroup();
        if (group != null) {
            group.setContext(new ActionContext(selection));
            group.updateActionBars();
        }
    }
    /**
     * Updates the message shown in the status line.
     *
     * @param selection the current selection
     */
    protected void updateStatusLine(IStructuredSelection selection) {
        String msg = getStatusLineMessage(selection);
        getViewSite().getActionBars().getStatusLineManager().setMessage(msg);
    }
    /**
     * Updates the title text and title tool tip.
     * Called whenever the input of the viewer changes.
     * Called whenever the input of the viewer changes.
     * 
     * @since 2.0