More cleanup

- Allow user filtering for purchase-order table in part view
- Remove some debug strings

(cherry picked from commit ea466c3588)

InvenTree/part/templates/part/orders.html

@@ -9,8 +9,11 @@
 <hr>
 
 <div id='button-bar'>
-    <div class='btn-group'>
+    <div class='button-toolbar container-fluid' style='float: right;'>
         <button class='btn btn-primary' type='button' id='part-order2' title='Order part'>Order Part</button>
+        <div class='filter-list' id='filter-list-order'>
+            <!-- An empty div in which the filter list will be constructed -->
+        </div>
     </div>
 </div>