For non-login user,show no drop down menu and return to home after press orbit button.

app/views/layouts/_orbit_bar.html.erb

@@ -2,6 +2,7 @@
 	<div class="navbar-inner">
 		<div class="container clear">
 			<div class="dropdown orbit-logo pull-left">
+			    <% if !current_user.nil?  %>
 			    <a class="brand dropdown-toggle" data-toggle="dropdown" href="#">Orbit</a>
 			    <ul class="dropdown-menu">
 							<li><%= link_to content_tag(:i, nil, :class => 'icons-dashboard') + t('admin.dashboard'), admin_dashboards_path %></li>
@@ -13,6 +14,9 @@
 							<li><%= link_to content_tag(:i, nil, :class => 'icons-cog') + t('admin.site_settings'), admin_site_site_info_path(@site) %></li>
 			        <li><%#= link_to content_tag(:i, nil, :class => 'icons-plus-cube') + t('admin.add_item') %></li>
 			    </ul>
+			    <% else %>
+			    	<a class="brand dropdown-toggle" data-toggle="dropdown" href="/">Orbit</a>
+			    <% end -%>
 			</div>
 			<ul class="nav">
 				<li><%= link_to t(:homepage), root_path, :class => 'orbit-bar-home' %></li>