update back button hide in oqs

app/views/oqs/home/index.html.erb

@@ -175,8 +175,10 @@
   <div class="col-lg-1 col-md-1 col-sm-1">
     <!-- OQS Buttons -->
     <br>
+     <% if current_user.role != "kitchen" %>
+    
     <a href="<%= dashboard_path %>" class="btn btn-sm btn-block btn-default waves-effect" role="button" aria-haspopup="true"><i class="material-icons">reply</i> Back </a>
-   
+   <%end%> 
     <button type="button" title="Print Order Item" id="print_order_item" class="btn bg-blue btn-block btn-lg waves-effect">Print</a>
 
       <!-- <button type="button" class="btn bg-blue btn-block btn-lg waves-effect" id="print_order_summary">Print <br/>Order<br/>Summary</button>